Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc. for iOS, macOS, watchOS, tvOS, and Linux. Swift is designed to work with Apple's Cocoa and Cocoa Touch frameworks and the large body of existing Objective-C code written for Apple products. It is built with the open source LLVM compiler framework and has been included in Xcode since version 6, released in 2014. On platforms other than Linux,[6] it uses the Objective-C runtime library which allows C, Objective-C, C++ and Swift code to run within one program.
Swift supports the core concepts that made Objective-C flexible, notably dynamic dispatch, widespread late binding, extensible programming and similar features. These features also have well known performance and safety trade-offs which Swift was designed to address. For safety, Swift introduced a system that helps address common programming errors like null pointers; in addition to introducing syntactic sugar to avoid the pyramid of doom that can result. For performance issues, Apple has invested considerable effort in aggressive optimization that can flatten out method calls and accessors to eliminate this overhead. More fundamentally, Swift has added the concept of protocol extensibility, an extensibility system. we will be discussing some of the things you can do with Swift.
1) Create iOS Applications
Swift is designed specifically for developing applications for the iPhone, iPad and other Apple devices. It is an intuitive language that makes it easy to write code even if you’re not an experienced programmer. With Swift, you can build apps that run on all Apple platforms such as iOS, macOS and watchOS. One of the best things about using Swift is that you don’t need any type of prior coding experience. As long as you have some basic computer skills and are willing to learn new things you can develop an app with Swift.
2) Build APIs
Swift can be used to build backend services for your mobile applications or web applications as well. You can use Swift on servers like Heroku or AWS (Amazon Web Services).
Swift is a new programming language for iOS, OS X, watchOS, and tvOS app development. Nonetheless, many parts of Swift will be familiar from your experience of developing in C and Objective-C.
Swift provides its own versions of all fundamental C and Objective-C types, including Int for integers, Double and Float for floating-point values, Bool for Boolean values, and String for textual data. Swift also provides powerful versions of the three primary collection types, Array, Set, and Dictionary, as described in Collection Types.
Swift is a powerful and intuitive programming language for macOS, iOS, watchOS and tvOS. Writing Swift code is interactive and fun, the syntax is concise yet expressive, and Swift includes modern features developers love. Swift code is safe by design, yet also produces software that runs lightning-fast.
Swift provides its own versions of all fundamental C and Objective-C types, including Int for integers, Double and Float for floating-point values, Bool for Boolean values, and String for textual data. Swift also provides powerful versions of the three primary collection types, Array, Set, and Dictionary, as described in Collection Types.
Like C, Swift uses variables to store and refer to values by an identifying name. Swift also makes extensive use of variables whose values cannot be changed. These are known as constants, and are much more powerful than constants in C. Constants are used throughout Swift to make code safer and clearer in intent when you work with values that do not need to change.