Swift is the native language for Apple ecosystem apps: iOS, iPadOS, watchOS, tvOS, and macOS. With its help mobile applications and desktop programs are written. And more recently, mobile applications can be run on a computer.
Swift’s ancestor, Objective-C, is already losing ground and losing in speed. In addition, Swift code is much better readable and easy to learn even for beginners.
Pros of Swift:
modern syntactic constructions: closures, generics, tuples;
safety: overflow protection, Optional’s, which allow you to no longer be afraid of null;
excellent code readability.
Mobile applications
Swift is the only modern language for mobile app development in the Apple ecosystem. As well as XCode – the only official IDE for this. That, on the one hand, limits the choice, on the other, you have a specialized tool for work.
Games and 3D graphics are made using the Metal API (the official library from Apple). And ARKit library allows you to create augmented reality (AR) applications.
Desktop
Another of the main purposes of the language is desktop applications for macOS. Development is also done in Xcode using many native libraries for code and UI. Additionally, Visual Studio 2019 allows you to write in Swift on Windows.
Server and web applications
This language allows that too. For example Vapor is a web framework written in Swift. Vapor allows you to write web applications, sites, APIs using HTTP or WebSockets. Plus Vapor is significantly faster than many frameworks. And it is convenient to use the same language on the client and the server.
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