app development – EngineerBabu Blog

Popular Web App Development Frameworks: Key Features & Benefits

Mayank — Fri, 09 Apr 2021 10:39:48 +0000

Technology is ever-evolving and so is the world of Web App Development. Trends like progressive web apps, API-first development, motion UI, and more are continuously reshaping the landscape of web applications. With the number of frameworks available and rising, zeroing down on the perfect web app development frameworks can be a difficult decision for developers. Over the last few years, there are a few frameworks that have gained tremendous traction and popularity. In this article, we will dig a little deeper into the space of the most popular frameworks for web application development. Additionally, we will try to understand the reasons behind their popularity and the rationale behind choosing them.

Popular Web App Development Frameworks – Front-End & Back-End

Dissecting the Various Layers of Web App Development

A typical web application is conceptually split into three parts, with very well-defined responsibilities, challenges, and strategies in place. Understanding the key concepts of these three subsystems and the infrastructure behind them is important before we dive deeper into the details of the frameworks that are used for web app development.

1. The Client-Side a.k.a The Presentation Tier

The web application which we directly run on our desktop or smartphone browser is typically the client part of the web application. The client-side of the application mostly runs on a browser, but it is not limited to that. Browser applications’ de facto language of implementation is HTML, CSS, and JavaScript. Implementing an application in these basic techs is difficult for large-scale applications so there exist many frameworks for web app development that makes client-side development easy.

2. The Server Side a.k.a The Logic Tier

In the grand scheme of web app development, the server is a part that is responsible for the logic and data handling. The server gets requests from the client-side and then provides the appropriate response like data or functions as requested.

3. The Database a.k.a Data Tier

Data is the king. Thus, in the case of many applications, a database is responsible for keeping the data safe and available when it is needed by the applications, Structured Query Language or SQL is one of the popular languages that is used to query these databases. Others are R, C#, Python, etc.

The Overall Infrastructure for Web App Deployment

The backend or the server side has to scale for many client-side applications. The back-end has to sometimes deal with a huge amount of data. Hence, it has to be available, scalable, and resilient. Some of the web applications are used across the world. Thus, the back-end servers are also spread across geographies and have to deal with country-specific policies for both data and feature management. Geo-based governance is an important part of any web application which is deployed across the world.

Front-End Web App Development Frameworks

The front-end of the web application is responsible for easy to use and functional interface. Beyond the front-facing design, the front-end is built on a fair amount of logic. It also require an appropriate level of data handling. In principal the front end of a web application is built out of the following units:

HTML: The content that needs to be shown on the browser is built out of HTML. Thus, it turns into the DOM [document object model] for the browser to render.
CSS: Cascading style sheets are responsible for the representation of the content. It represents how the content is displayed to the user.
JavaScript: The dynamic logic behind a web application that is responsible for the context-specific update of the web application is typically implemented in JavaScript. Therefore, JavaScript is like the language of the web which is understood by pretty much all browsers. However, many languages compile into JavaScript like TypeScript or CoffeeScript.

While the basic building blocks are the above three languages, there’s much more required to build a large and complex web application’s front end. We need to have frameworks in place that make it easier to develop the front-end. Let’s take a look at a few of these:

1. jQuery

jQuery is built on the idea of “do less, get more”, it wraps a lot of commonly used functions by the web applications developers and then provides simple to use APIs for the same. Such high-quality code being readily available to the developers means the difference between getting to concentrate on the task at hand or trying to reinvent the wheel. It also fixes interoperability between browsers

Features and Advantage

jQuery is a JavaScript library that is lightweight and fast. It requires less time to travel through wire, load, and execute.
jQuery makes DOM manipulation extremely simple and fast.
jQuery simplifies AJAX call and DOM manipulation.

2. AngularJS

Angular.js is Google’s framework. It is supported by the tech giant and will be there for years to come. Hence, it is used to build dynamic web apps and SPAs (Single-Page Apps).

Features and Advantage

An instruction-based and easy-to-use interface, that makes it easy to build a UI that stays in sync with the updates of the application state.
Model-View-Controller or (MVC) a software design pattern that gives an outline of how the front-end UI ideas should be organized into actual code.
High-performance code and the regular update makes it dependable

3. ReactJS

React.js was developed by Facebook and is known for its high performance. It is one of the most used front-end UI development frameworks and is a preferred choice for web app development.

Features and Advantage

Virtual DOM (Document Object Model) that makes DOM updates lighting fast and efficient
JSX allows putting HTML and JavaScript together for UI definitions

Mirror mirror on the wall – which is the fairest framework of them all?

According to a recent developers’ survey jQuery is the most popular front-end framework that is preferred among the developers for front-end development. ReactJS and AngularJS are not far behind. However, in comparison to AngularJS and ReactJS, the latter is the clear preference among developers for the front-end technologies for web applications. The reasons behind the popularity of ReactJS is easy to learn, fast, and heavily supported by the developer community.

With EngineerBabu you can access developers with expertise in all the above frameworks be it AngularJS, ReactJS, Python, and many more. See the range of our services here.

Back-End Web App Development Frameworks

The technology spectrum for server-side back-end development can largely sub-divided into two parts i.e., the choice of the implementation language and the type of framework used. Both these aspects are related and impact the development and maintenance process of the back-end heavily.

Let’s take a look at the most common programming languages and their supported frameworks:

Python is a preferred language when it comes to complex app development – it is powered by the Django, Pylons, Flask frameworks.
JavaScript is emerging as another language of choice for the back-end developer because of frameworks like NodeJS.
Java is a fast, scalable, and secure language. For web application development it generally works with the Spring, Struts, and Hibernate frameworks. J2EE is the widely use standard for enterprise applications in Java.
Ruby is a programming language with many admirers. However, it has a low barrier to entry and allows you to create powerful apps in days. Ruby on Rails (RoR) is a mature open-source framework that makes development much easier.
PHP is a widely adopted language. Laravel and Symfony are one of the most popular PHP frameworks.

Now let us take a look at some of these web app development frameworks mentioned above and dig a bit deeper into what makes them popular.

1. Django

Django is an open-source back-end framework based on Python. It follows the Model-View-Controller (MVC) pattern. Django is good for sophisticated and feature-heavy data-driven websites. This back-end framework facilitates reduced implementation, reusability, and faster development.

Features and Advantages

Ease-of-Use – Django is easy to use, and a low learning curve helps developers to speed up the entire development process from start to finish.
Features – Django provides a wide variety of features to help users take care of some common web development requirements. Tasks such as user authentication, sitemaps, content administration, and much more can be easily implemented with this framework.
Security – Django framework has robust security and can easily prevent security issues, such as cross-site scripting, SQL injection, request forgery, and clickjacking.
Scalability – Django offers a high level of scalability that is the reason why many of the world’s leading websites rely on it.

2. Laravel

Lavarel is an open-source PHP web framework for developing web applications. It follows the model–view–controller (MVC) architecture. However, Lavarel also offers modular packaging with a dedicated dependency manager. It also provides ways of accessing relational databases along with maintenance and deployment utilities. It has an MIT license and is hosted on GitHub.

Features and Advantages

Authentication: Implementing authentication is quite simple with Laravel as it has simple authorization logic organization and easy control of access resources.
MVC Architecture Support: MVC architecture pattern support effectively separates presentation and business logic layers and offers many functions, facilitates better performance, and improves both scalability and security.
Cache Backends: Offers support for Redis, Memcached, and other widely-used cache backends. Therefore, tt access the file cache driver, which gets cache object storage in a file system and in-memory cache like APC or Memcached for larger apps.
Template Engine: Features lightweight built-in templates that can be utilized for generating layouts and seeding contents. Designed for the development of both simple and complex sectioned layouts.

3. ExpressJS

Express.JS is a Node.js web servlet framework that is open-source and available under the MIT license. Thus, it is used for building APIs and web applications.

Features and Advantages

Learning Curve – JavaScript is the most commonly used language for web front-end development. A lot of tutorials, code examples, and developer communities make it easy to start and master.
Full-Stack JS Features – Node.JS allows the use of JavaScript for both the server-side and client-side applications. As a result, there is no need for separate engineers for front-end and back-end development. Great way to save time and money.
High Performance – The V8 JavaScript engine is fast, really fast. The engine has JIT which compiles the code into machine code and makes it run at native speeds. Non-blocking I/O operations speed up the execution as the code is waiting for some execution to end before moving forward.

4. Spring Boot

Spring Framework is an open-source application framework in Java. Web Applications can use all the core features of this framework. Spring is a counterpart of the Java EE framework. While Java EE is a preferred language for monolithic legacy platforms. Whereas, Spring works great with microservices-based platforms.

Features and Advantages

Initialization – SpringBoot performs lazy initialization. This drastically reduces the time for application start.
Fluent Builder API – tools support inbuilt to build APIs from the framework itself.
Liveness State – An application can notify if its internal state allows it to function or process recovery in case of a failure.

Conclusion

The web app development landscape is constantly evolving. Speed, security, and usability are the three critical factors that will determine the success of any web application. Along with this the seamless integration of technologies like voice, AI, AMP, etc. will also play an important role. The web app development teams of any enterprise will need to stay up-to-date with these trends and technologies and choose the right frameworks for web app development. With EngineerBabu building a full-stack development team with expertise in all the latest frameworks. Tell us your requirements.

Ideas for Apps That Haven’t Been Made

Mayank — Wed, 12 Aug 2020 05:13:04 +0000

The mobile application industry is huge and is only expected to grow at a high pace in the coming years. It is becoming possible only because of rising technology, which was unusual to expect such growth a few years ago. There is an ocean of mobile application and is multiplying. Therefore, the new entrants used to seek ideas for apps that haven’t been made until now.

Evidently, in the last decade, the world has seen a drastic evolution in the mobile app industry, especially the Android and iOS-based smartphone applications. There are approximately 3.5 Million apps on Google Play Store and 2.8 Million apps on the iOS App Store. Despite that, a number of mobile apps get added on both platforms daily. Hence, the new entrants in the mobile app industry used to seek new ideas for apps.

The mobile apps are in so much demand because they are much easier to navigate and use, and it looks better than a huge website. As a result, the Mobile App Development businesses are in high demand. Therefore, almost every developer in the world seeks the opportunity to fetch some good money from this field.

To enter into this wonderful business, if you are looking for some fresh yet innovative ideas for app development, then we have some for you.

Source: RawPixel Website

Innovative Ideas for Apps That Haven’t Been Made

Here, we have compiled a list of 25 innovative Android and iOS App ideas that you can adapt and plan out for its working and development right away. The list includes many simple ideas, which will make it easier for beginners to implement and learn business strategies.

1. Brand Identifier App Idea

It is quite a unique Android and iOS App idea. Brand Identifier app allows its users to find the exact brand and product description, just by scanning the logo or tag of the product. It will work for Apparels and almost for all types of products available in the market.

The Brand Identifier app will provide all the related information to that particular product- articles, reviews, online availability for sale, its manufacturer, and other relevant details. For apparels, the app can also inform the user about its authenticity, that it is original or copied. Such apps can be good ideas for app development and introducing it in the market.

2. Scan and Shop Apps

The scan and shop app ideas facilitate users to scan any product and find it online with the image. It will help to search and purchase the product instantly from online shopping platforms. Not only this, being an innovative and smart business owner you can add more features to the app. It will make your mobile app idea multi-tasking and an interesting app to attract users and more downloads.

Initially, with specific and straightforward features, scan and shop apps can be a good app idea for startups.

3. 3D Presentation App

The 3D Presentation app is another addition to the list of innovative ideas for apps feasible for startups and others. This app allows you to present your 3D model in that form only and anywhere.

It will allow you to import your 3-dimensional model to your android and iOS smartphone, and present it without any other equipment. You can present your 3D model when and wherever you wish to. It is an appropriate mobile app idea for business project presentations and in other fields as well.

4. Recognition and Identification App Idea

It is a very fascinating and unique idea for app development. It can rescue in multiple situations where you felt trapped and out of time. Such apps allow you to fetch the details and description on your smartphone screen, just by scanning an image.

You simply need to take a picture of the living or non-living creatures, and within a fraction of seconds, you can obtain the details about it. The app makes sure to provide maximum and valuable information to you about that specific object available on the Internet.

The picture could be of a celebrity from any event or movie, paintings, extinct animals, and many more. Recognition and Identification App deliver you all the available details about that image on your mobile device.

5. App based on Barter System

It is yet another one of the most innovative and unique ideas for apps development. As the name suggests, it works on the Barter System. Following the traditional method of shopping, but in a modern manner. Barter Exchange app can be a great business idea if implemented and marketed well. It can be a great help and a brilliant platform for all those who can’t find an appropriate place to buy something in their budget or without paying any money.

In the Barter Exchange system app, the users can share their product on the platform which they want to get rid of. As well as, can look for the existing product on the website which they want for them. Then, they can exchange their product with the other interested party.

Example; You can take my iPhone in exchange for your laptop. Sounds, Cool! So, adopt this unique Android and iOS app idea, and put it on the floor.

Source: RawPixel Website

6. Garage Assistant App

The Garage Assistant app idea is quite similar to the parking lot assistant app. However, both the apps can be combined to provide both the facility at a single platform.

Looking for appropriate garage and space availability in the garage is quite a time taking. Finding the spot for you in the garage at your convenient time and on your way to your destination is a serious task. As, it is always not possible to get the spot at your favorite garage at your convenience. Hence, this Garage Assistance app came in your rescue.

The app will help to find the spot at your nearest garage at your convenient time slot. As a result, you can save your time and plan things in a manner to visit the garage now or make it for the next day. Such new ideas for apps will definitely help users to avoid unnecessary hassle and avoid skipping any meeting or get-together’s.

7. Delete Phone Number from Other’s Device

Other interesting ideas for apps startups can be providing a platform to delete your phone number from someone else’s phone. Suppose you don’t want to share your contact number directly or through other sources with someone. The problem is you can’t have control over other sources from disclosing your contact number.

Hence, this app will help you in erasing your contact number from that person’s mobile phone just by a few taps on your screen. Isn’t it amusing? The app also allows you to delete your contact number from all the existing contact lists in mobile phones.

8. Intelligent Cooking App

It is one of the most interesting ideas for apps that haven’t been made. This brilliant app idea can be a good business opportunity for startups and will help people. The Intelligent Cooking mobile app idea will help its users to prepare good dishes from minimum available resources.

The app will take input from the user about available ingredients at home and then suggest or recommend the multiple recipes that can be prepared with those ingredients. Such app ideas can be a great help for those who are looking to prepare a nice and new dish with the available ingredients.

9. Criminal Alert App Idea

The Criminal Alert App, is a wonderful android and iOS app idea for startups that can alert all its users from criminals in their areas. It is one of the most excellent and adequate ideas of apps to keep its users safe, secure, and aware.

Evidently, not everyone is aware of the miscreant activities or criminals in their areas. But with this app, the user can be aware and conscious about such activities and take precautionary measures to keep them and their family safe. The criminal alert mobile app idea will have an alert feature as well to inform the police and share your location through GPS features to the police.

10. Exam Practice and Study App

There are a significant number and variety of educational or e-learning apps available in the market. But it is quite a different app idea feasible for both android and iOS platforms. It is a virtual platform that provides a study area for students to meet and prepare for their school, college, and competitive exams.

The students get a separate study area along with other students of the same disciples. It is a kind of virtual group study approach to let students study and discuss their problems and learnings with each other. The exam Practice and Study App can also provide different tools to help students learn, such as study tools, help, previous year question papers, group discussions, and free study material. Among other e-learning apps, it is one of the unique ideas for apps that haven’t been made in the educational industry.

11. Self Supermarket Checkout Apps

Visiting a supermarket and waiting in a long queue to get the billing done is quite a tiring process. Hence, here comes a unique app idea to introduce a self-checkout app for shopping in supermarkets.

This app can be used individually by the customers or used through the trolley in the supermarket. These trolleys automatically scan each product when the customer puts the product in their cart to get it billed. It will fasten the long process of billing, and on the counter, the customer only has to pay the bills its smart trolley is showing and they are sorted.

It is a very sorted Android and iOS app idea to provide the hassle-free shopping experience. The customers can scan the products through their smartphones with the help of this app and can make instant payments through integrated e-payment options.

12. Virtual Interior Designing App

It is a very handy app idea, especially for those who wish to have their houses designed by specialists. Virtual Interior Designing is one of its kinds of ideas for apps that haven’t been made.

The app allows the users to share the picture of their room or the place they wanted to get designed. Then the app allows them to apply the variety of available design options, color combinations, curtains, wall stickers, other decorative pieces, furniture, etc. It will make your work easier and suggest numerous designing patterns to have the reference and design your dream home.

The Virtual Designing App idea will also recommend to you the stores and places where you can buy these interior items based on your budget. It is a perfect app idea for startups and applicable for implemented on Android and iOS app ideas too.

Source: RawPixel Website

13. Real-time Personal Vehicle Sharing Mobile App Idea

Real-time Car Sharing apps can be the need of the future where we would like to minimize traffic congestion, fuel-saving, low pollution, and various issues that can be solved. It is a futuristic idea for apps that can be built and provide solutions to many problems.

This app will allow users to enlist their 4-wheeler or 2-wheeler on the app whenever they go somewhere and are open to sharing their ride with someone. This will help other travelers to share the ride with them if it is on their way and split the cost accordingly.

It is a very brilliant app idea to provide solutions for multiple problems. It just requires user awareness of the environment and a caring attitude towards helping others. Real-time vehicle sharing can be out-n-out a top-class app idea for startups businesses.

14. Voice Language Translation App Idea for Startups

Voice Language Translation App is an exciting and useful idea for apps that haven’t been made. It naturally eases the complete flow of conversation and avoids the hassles of language learning.

Many times, people used to require a translator to especially in high-profile meetings between different countries. This can be easily solved with this app and doesn’t need any extra person by their side to translate the words, and it may avoid miscommunication as well.

The app simply translates the spoken words (in any language) of a person in real-time. It allows the other person or the listeners to understand the saying in their language or familiar language. All the translation will be done in real-time and without any delay in language conversion.

Such apps can be beneficial for everyone, suppose you are traveling to other countries and don’t understand the language, then also you can use it. It is an excellent app idea and can be effectively used by Android and iOS users.

15. Tenant Finder App

Tenant Finder Apps can be another great idea for apps development that haven’t been made. It could be a fantastic tool for landlords to find potential tenants directly. The app will cut-off the requirement of dealers and allow tenants and landlords to communicate directly.

The app will help landlords to find the good tenants, apart from that guide tenants to find the polite and helping landlords. The tenants can also submit reviews and feedback based on their experiences. Such reviews will help other tenants to choose the better landlords for them.

Tenant Finder App can be an effective android and iOS app idea as it can easily get downloads from tenants and landlords.

16. Food Donation App

We all see a lot of food wastage in numerous parties, functions, hotels, and restaurants daily. This food can be used effectively and save many from starving. It is a great charitable cause and can be done by anyone; it just requires your generosity. Food Donation App can be the most beautiful ideas for apps to introduce a startup.

The Food Donation App allows all the potential food donors to apply for donating excess food from their address. Based on that, at a definite time, a genuine person can just pick up the excess food from that place and collect other donations as well. After that can arrange a method to distribute that food in a few hours to poor and needy people.

It is a great cause to step into it and help others. With this service, you are saving food from getting wasted and helping a lot of poor people from starving. It is a beautiful human cause and a great initiative to motivate others as well to help people.

17. Transport Alert App

A Transport Alert App can be useful for bus, train, and air services. The user can set reminders or alerts for their preferred timing of bus and train. Thus, the app will help them to catch their bus or train on time by alerting them of the bus/train scheduled time, departure time, delay time, change in timing, and other relevant details.

The app can also provide the exact location and movement of the train/bus with a GPS facility. It allows users to check out the live running status of their transport in real-time. The transport alert app will minimize the chances of its users to miss their bus/train from boarding. It is a useful tool for the users and can be a good Android and iOS app idea for startups.

18. Text Reader App

Text Reader App can definitely be the unique ideas for apps that must need to be built. The app can read the texts written on the paper and allow you to save your textbooks in the digital format on your PC or smartphone.

The app will accurately scan the pages to save it in digital format and read the written texts and numbers written on it. It can be a great app for those who like to listen to stories or books instead of reading. Apart from that, the app also allows you to store and save all your books in digital format. You can do all this by yourself without visiting any shop or requiring any specific scanning device.

19. Lost and Found App

Lost and Found Apps can be good ideas for apps that haven’t been made. The app will help users to find their lost items. Suppose, you lost your keys somewhere in or near the parking area, or your jewelry in the trial room. Can you hope or expect from someone to find the owner of these things; no, never. No one bothers to dedicate their valuable time in finding the owner of such things and finding the person whom he/she doesn’t know.

The app aims to connect the lost items to its original owner. If anyone finds your belongings and couldn’t find you, then they can share the thing on this app along with their contact information. The one who owns the thing can easily identify it, and connect to that person, get it back easily and save their time instead of looking for it or feeling sad for losing it.

20. Payment Reminder App

We all go through this every month, where each app reminds us multiple times to clear the bills and avoid the late charges and hassle-free service. But having a single app for all these bills and a gentle reminder to clear the bills will be a good option to get free form the multiple apps on your smartphone.

The payment reminder app idea will ease the burden of payment and allow you to pay all the bills online and from a single app only. It will save a lot of time and fasten the complete payment process instead of visiting an app or website individually for clearing the monthly bills.

21. Language Learning & Teaching App Idea

It can be a social language learning app where the interested person can teach or learn their preferred language from each other mutually. The person having the same interest can easily match and take their learning experience ahead.

The Language Learning and Teaching app can be a fantastic Android and iOS app idea to attract learners efficiently. Many people around the world like to learn other languages, but because of expensive courses and training sessions, they failed to do so.

To help all these interested people, this idea for app development could provide a great opportunity and benefit many people. The users at their convenience can choose the training partner or a teacher to learn the new language.

Source: RawPixel Website

22. Smart Finance Investment App Idea

The Smart Finance Investment App is an AI-based app that does market research for its users, does a thorough analysis of collected data, and then presents it to you on your smartphone.

It will help you invest your earnings accordingly to gain good profit in the future and increase your savings. Based on your earnings and investment capabilities, the app will suggest you the best available options. The app can be an excellent idea for startups to build a food business with financial assistance.

The app also allows you to make e-transitions through the app to make your complete financial investment planning easier and quicker. It is a brilliant Android and iOS app idea to put firm steps in the financial market.

23. House Assistant App Idea

In such a busy daily schedule, we all seek an assistant for various household works like mowing your lawn, daily grocery, feeding your pet animals, house cleaning, and many other small and important daily activities. But finding the right persons for doing all these tasks is a difficult task in itself.

The House Assistant App can be a problem solver for you and help you find the right helper. Through this app, you can find a suitable person near to you to do the job easily and instantly for all such small work.

It can be one of the best ideas for apps that haven’t been made and successfully provide a valuable solution to people in their daily lives.

24. Used Item Donation and Selling App

There are many items and products around us that we wanted to get rid of, but don’t know how to do so. For such work, the used item donation and selling app help you do so and fulfill the requirements of needy people..

It is basically a platform that can collect local or neighboring people to donate their clothes, food, stationery, books, old furniture, household items, and many other things that they don’t need. People can share all these things based on their convenience; if they want to sell at a cheaper rate or donate, they can do both on their requirements.

People can search for items based on type or location and get the things from the provided contact details. The app platform can also allow its user to auction the good quality items for charitable causes too.

25. Suicide Control App Idea

We all are getting swamped in the race for success and career, as a result the pressure on us is leading many suicidal cases. Therefore, to help and guide people to avoid such conditions, these kinds of ideas for apps are very much needed for us.

It will be a kind of online counseling platform, which provides humanitarian assistance to such types of peoples. In suicidal mode, sometimes talking to someone and sharing your problems can be very helpful. Therefore, this app idea will provide assistance to talk to them and convince them to commit against such actions.

These are 25 different ideas for apps that haven’t been made and can prove to a brilliant startup business. As, these ideas for apps are very much in-demand in the market but are not available for use. If you would like to build any app from the list, it can be a great help for those people and boost your business instantly due to the demand for these apps.

Source: RawPixel Website

If you feel ambitious and would like to try any of the ideas as mentioned above for apps, give it a try. For this, you need to build the app for all mobile users. In this respect, EngineerBabu can easily solve your problem. You only need to decide which app idea you would like to pick and what features you wanted to add to serve your users. Rest development can be taken by the experienced and dedicated team of developers at EngineerBabu. Feel free to connect us and take your startup business idea to live as soon as possible.

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Swift 101 – Things Every Beginner Should Know!

Mayank — Sat, 09 Feb 2019 11:09:56 +0000

What is Swift?

Swift is a general-purpose, multi-paradigm programming language developed by Apple Corporation for the products catering to its ecosystem. These include iOS, macOS, Linux, and z/OS platforms. It is designed to run along Apple’s Cocoa and Cocoa Touch frameworks, and the large body of existing Objective-C code written for Apple products.
It is built using the open-source LLVM compiler framework and has been included in Xcode since version 6. It utilizes the Objective-C runtime library which allows C, C++, Objective-C, and Swift code to run within one program.
Swift is exceptionally safe, and interactive and combines the best in modern language thinking, with wisdom from the broader Apple engineering culture and copious contributions from its open-source community.
If you wish to venture into the domain of App Development, then these series of posts could serve as a holy grail for you.
Here’s our guide for beginners to learn Swift. Go through it sincerely, and by the end of it, you’ll acquire a clear and comprehensive understanding of the concepts of Swift 101.

Variable and constant

In the entire project life cycle, we need to stock a lot of information. Some data needs to be altered while sometimes it needs to be as is. To achieve this, we have Variables & Constants.

A variable is a designated memory location which temporarily stores data and can acquire different values while the program is running. One can declare a variable by using the ‘var’ keyword.

A constant is a designated memory location that briefly stores data and remains the same throughout the execution of the program. If you want to retain a particular value – declare them as constant.If you try and change the value of constant, Xcode will show an error message and won’t proceed further. This helps in code optimization and makes your code run faster.Constant in Swift is declared by using ‘let’ keyword, as was applied in elementary Mathematics.

NOTE: It is important to note that we must ALWAYS assign a unique name for constants and variables to avoid a compilation error.

Data Types

We have different classifications of data in general, like name, phone number, weight, etc. Now how to represent them in a project using the language of computers?
Here comes into play – Data types. In computer science, including computer programming, a data type or simply type is an attribute of data which tells the compiler and the interpreter how the programmer intends to utilize the data.
i) String: As the name suggests, we can store a sequence of characters in this data type.
For example :

Any entity: “Engineerbabu”, “India”, etc.
Any sentence: “How are you?” , “This is a really nice blog.”

Syntax:
import UIKit
let constant : String = "Mitesh"
print (constant)

ii) Int: Int is used to store the whole number, where Int32, Int64 is used to store 32 or 64 bit signed integer and UInt32, UInt64 is used to store bit unsigned integer
For example: Any whole numeric number: 42, 100, 999

Syntax:
var int = 42 
print (int)

iii) Float: This data type is applied to store a 32-Bit floating point number. They are used to store the fractional component.
For example: Any fractional value: 1.343555

Syntax:
var float = 1.343555
print(float)

(iv) Double: This data type is employed to store 64-bit Floating point number. They are also employed to store the fractional component. Double has better accuracy than float.
Any fractional value: 1.34315

Syntax: 
var double = 1.24315
print (double)

v) Bool: Bool stores a Boolean value which can either be true or false. Use this when you require a firm outcome.
For example:

Do you want to receive push notifications?
Do you want to allow the user to see your mobile number?

Syntax:
var boolVariable = false
boolVariable = true

Here are the limits of the data type.

Type	Typical Bit Width	Typical Range
Int8	1byte	-127 to 127
UInt8	1byte	0 to 255
Int32	4bytes	-2147483648 to 2147483647
UInt32	4bytes	0 to 4294967295
Int64	8bytes	-9223372036854775808 to 9223372036854775807
UInt64	8bytes	0 to 18446744073709551615
Float	4bytes	1.2E-38 to 3.4E+38 (~6 digits)
Double	8bytes	2.3E-308 to 1.7E+308 (~15 digits)

iv) Dictionary: Dictionary is employed to store an unsorted list of values of the same Swift 4 puts strict checking which does not allow you to enter a wrong type in a dictionary even by error.

v) Array: Arrays are used to store lists of values of similar type. Swift 4 puts strict checking which does not allow you to enter a wrong type in an array, even by mistake. All the objects of an array ought to be of the same data type, i.e., int string, dictionary, double, etc.

Conditional statements

Sometimes we wish to execute code if a specific condition is valid. It is represented primarily by the if and else statements. You give Swift a condition to check, then a block of code to execute if that condition is found true.

Loop

When it comes to performing a repetitive task, it is not feasible to type the same code again and again; instead, one can use loops. Loops are simple programming constructs that repeat a block of code for as long as a condition is deemed true.

Example:
a) For loop
for i in0..<5 {
print(i)
}
b) While loop
var index =10
while index <20{
print("Value of index is \(index)")
index = index +1
}

Function

Functions are self-contained blocks of code that perform a specific task. You can give a function a name that identifies what it does, and this name is used to call the function to perform its task when needed. Every function in Swift has a particular type, consisting of the function’s parameter type and return type.
Example:
a) Function definition without parameter and return type: This method is not taking any parameter and returning value that needs to be handled.

func student()->String{
return"Ram"
}

b) Function definition with parameter and return type: This is an example of a method taking a string parameter and returning received a string that needs to be handled from where it is called.

func student(name:String)->String{
return name
}

c) Function call without parameter and a returned value

student()

d) A function call with parameter and return value

print(student(name:"Mohan"))

Optional

The optional type in Swift 4 handles the absence of a value. Optional means either “there is a value, and it equals some value like “X” or “there isn’t a value at all.”

var string: String?=Nil
if string !=nil{
print(string)
}else{
print("string has nil value")
}

Forced Unwrapping

If you defined a variable as optional, then to acquire value from this variable, you need to unwrap it. This is achieved by placing an exclamation mark at the end of the variable.

var string: String?
string ="Hello!"
if string !=nil{
print(string)   // Optional("Hello!")
}else{
print("string has nil value")
}

Now apply unwrapping to get the correct value of the variable

var string: String?
string ="Hello"
if string !=nil{
print(string!)    // "Hello!"
}else{
print("string has nil value")
}

Enumeration

It is an user-defined data type which consists of a set of related values. “enum”Keyword is used to defined enumerated data type. Enum is declared in the class, and it can be accessed throughout the instance of the class. Initial member value is defined using enum initializers, and functionality is also extended by ensuring standard protocol functionality

Example with type:
enum GenderType  : String{
Case Male
Case Female
}
Switch Statement using enums:
var gender = GenderType.Male
switch gender {
case .Male:
case .Female:
}

Struct

Structs are basic constructs of a program. In Swift, structs can have properties and functions. The key difference is that structs are value types and classes are reference types. Because of this, let and var behave differently with structs and classes.

structPerson {
var name:String
var gender:String
var age:Int
init(name: String, gender: String, age: Int) {
 
self.name = name
self.gender=gender
self.age = age 
 }
}
let person1 =Dog(name: "Mohit", gender: "male", age: 14)
var person2 =Dog(name: "Ram", gender: "male", age: 25)
person2.name ="Lucy"

Class

Classes are the building blocks of flexible constructs and are similar to constants, variables, and functions users use to define class properties and methods. Swift 4 gives us the functionality that while we declaring classes the users need not create interfaces or implementation files which we need to do with Objective C. Swift 4 allows us to create classes as a single file and the external interfaces will be created by default once the classes are initialized.
What are the benefits of having Classes–

Inheritance
Typecasting
Automatic reference counting

There are specific characteristics which are similar to structures

Properties are defined to store the values
Subscripts are defined for providing access to values
Methods are initialized to improve functionality
Functionality is expanded beyond default values

Example:

class student {
var studname: String
var mark: Int
var mark2: Int
}

Wrapping up…

I hope you enjoyed reading this brief Swift Tutorial. Start practicing on these basics right away, we’ll be creating many more posts for you to clearly comprehend the basics of Swift.
This is just the tip of the iceberg when you consider the vastness of this domain. We’ll be furthering covering various aspect of Swift Programming in the upcoming series of articles. So, stay tuned!

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