Swift 4.0 Released!

Swift 4 is now officially released! Swift 4 builds on the strengths of Swift 3, delivering greater robustness and stability, providing source code compatibility with Swift 3, making improvements to the standard library, and adding features like archival and serialization.

Swift is a general-purpose programming language built using a modern approach to safety, performance, and software design patterns.

Updates

Swift 4.0 is a major language release and contains the following language changes and updates that went through the Swift Evolution process that can be viewed by clicking here

Apple (Xcode)

For development on Apple’s platforms, Swift 4.0 ships as part of Xcode 9.  Open-source Swift can be used on the Mac to target all of the Apple platforms: iOS, macOS, watchOS, and tvOS. Moreover, binary builds of open-source Swift integrate with the Xcode developer tools, including complete support for the Xcode build system, code completion in the editor, and integrated debugging, allowing anyone to experiment with the latest Swift developments in a familiar Cocoa and Cocoa Touch development environment.

Linux

Official binaries for Ubuntu 16.10, Ubuntu 16.04 and Ubuntu 14.04 are available for download. Open-source Swift can be used on Linux to build Swift libraries and applications. The open-source binary builds provide the Swift compiler and standard library, Swift REPL and debugger (LLDB), and the core libraries, so one can jump right in to Swift development.