Swift Tutorial

Swift is a powerful general-purpose programming language developed by Apple to create iOS applications such as for iOS, macOS, watchOS, and so on. Swift code is easier to understand and write. Swift is open Source, fast, Powerful and Interoperability(Code of Swift can be used along with existing Objective-C projects). Swift is also used in server applications which provides security and high performance. It has a similar syntax to Objective-C or C.

This Swift tutorial cover all the topics of Swift Programming such as Environment Setup, First Swift Program, Syntax, Datatypes, Variables, Constants & Literals, Operators, Control Statements, Loops, Strings, Functions, Collection etc.
Swift Programming Language.

In this Swift tutorial, you will learn the basics of Swift which include Keywords, datatypes, functions, Swift OOPs, and collections. You will also learn how to build and publish apps using Swift language and get the 6 best iOS project ideas using Swift language.

Swift Tutorial Page Index

Swift Introduction
Swift Data Types
Swift Control Flow
Swift Functions
Swift Collections
Swift OOPs
Swift Additional Topics
What is Swift Programming Language?
Why Learn Swift?
Applications of Swift

Swift Introduction

Swift Data Types

Swift Control Flow

Swift Functions

Swift Collections

Swift OOPs

Swift Additional Topics

Swift 4

Swift 4 is the latest version of Swift developed by Apple for iOS and OS X development. It inbuilt the features of Swift 3 and improve its robustness and stability. Swift 4 has enhanced the library, includes features like smart key paths and serialization, shortened build times and size of app binaries.

Swift 4 introduced a playground feature in which programmers can write their code with live preview. Swift 4 unifies the procedural and object-oriented portions of the language.

Swift 4 follows a modern programming practice to deal with programming errors:

  • In Swift 4, variables are always initialized before use.
  • Array indices are checked for out-of-bounds errors.
  • Optionals ensure that nil values are handled explicitly.
  • Integers are checked for overflow.

What is Swift?

Swift is a powerful general-purpose programming language developed by Apple Inc and also used in server applications which provides security and high performance. It is a powerful and intuitive language. Swift code is safe, precise and fast and Swift follows an Objective-C runtime library that allows C, Objective-C, C++ and Swift code to run within a single program. Swift is built with an open-source LLVM compiler and included in Xcode since version 6.

Swift is a multi-paradigm compiled language created by Apple. It was first introduced in 2014 at the worldwide developer’s Conference and was designed as a modern successor to Objective-C. It is famous for building applications that grow inside Apple’s walled garden. The original Apple platform language had been used since the 1980s. Swift interop with objective-C but provides a shorter and more readable syntax. It also provides features like memory safety and type inference to improve developers’ productivity.

Today Swift is used for building mobile apps on iOS, desktop apps on MacOS, and wearable apps for watch OS. It is also open source which means it can be used to build software outside of the Apple platform. It’s compiled into native machine code. It’s built on top of the LLVM toolchain like many other modern languages. Swift supports REPL(Readable print loop) which allows you to experiment with the code in a playground without recompiling it and this makes Swift a greater language for beginners to learn and develop by using it.

Why Learn Swift?

  • App development for iOS, macOS, watchOS, and more.
  • Safety features and error prevention.
  • Performance optimization for fast and responsive applications.
  • Modern, expressive syntax for clean and readable code.
  • Growing popularity and demand for Swift developers.
  • Open-source community collaboration and continuous improvement.
  • Future-proofing skills within the Apple ecosystem.
  • Versatile applications, including server-side development.

Applications of Swift

Some of the most common applications of the Swift language are:

  • MobileApp development: Swift language is a language of choice for developing iOS and iPadOS apps. With its clean syntax, dynamic features, and powerful performance, Swift has made iOS app development faster and more efficient.
  • Server-side Development: Swift can be used to build server-side applications, particularly in the realm of web development. With frameworks of it, developers can write server-side applications using Swift.
  • Game Development: Swift can also be used to build games in iOS, macOS, watchOS, and tvOS. With its fast performance and advanced features, Swift is a great choice for game developers.
  • Machine learning: Swift has a number of machine learning libraries, such as TensorFlow and CoreML, which can be used for creating intelligent applications, including image and speech recognition, natural processing, and more.
  • Desktop App Development: Swift can also be used for developing macOS desktop applications. With features like native code execution, memory management, and powerful API Swift.


Swift is a powerful and expressive programming language that is used for building various applications for Apple’s platforms such as iOS, macOS, watchOS, and tvOS. Swift has several features like modern syntax, memory safety, high performance, and more readable syntax which helps beginners to learn easily. It is a flexible and robust language. It has a vibrant and active community of developers, which contributes to its popularity. This community is continuously adding new functions, libraries, tools, and frameworks to make Swift development more comfortable and more productive to use. Overall, Swift is an exciting programming language to learn, and it has great potential in building robust and efficient applications for Apple’s platform.

FAQs on Swift Tutorial

Q.1 What is the difference between Swift and Objective-C?

Objective-C was the primary language used to build applications for Apple’s platform and it is introduced in the market before the Swift language. It is first, older and more mature language . It has more difficult syntax to learn as compared to swift language.

Swift is more modern and has several features that Objective-C doesn’t have like options, closures, and generics. Swift is also faster and easier to learn than Objective-C. It is an open-source and growing language.

Q.2 Is Swift open-source?

Yes, Swift is an open-source programming language, which means that anyone can contribute to its development which includes adding new features, fixing bugs, and improving the performance of the language.

Q.3 Can Swift be used for Android development?

As we know that Swift is a programming language that is used for building applications for Apple’s platforms, but it is not limited to them. You can use Swift for Android app development, but all you need to use third-party tools and libraries to make it work.

Q.4 Can Swift be used for server-side programming?

Yes, Swift can be used for server-side programming. There are several web frameworks Kitura and Perfect that make it easy to build server-side applications using Swift. It has a strong type of system and memory safety features that can help prevent common errors that can occur in server-side programming, so Swift can be used for sever-side programming.