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.

Swift Tutorial