Apple has open sourced Swift, a modern programming language for iOS, OS X, watchOS and Linux.
Swift 4.0 is much faster and adds new features: protocol extensions, a new error handling model, mutability warnings, synthesized headers in Xcode, markdown in comments, Objective-C generics and nullability annotations, and more.
Get the full Swift development enviroment for OS X or Linux from GitHub. Windows support will be added later. If you just want to try Swift in the online playground, all you need is the web browser.
Do you have any questions? Ask other developers on our forum. Find the best solutions for Swift programming. Write you thoughts and source code. Become one of Swift experts and share your knowledge.
Read the official Swift Programming Language Book (Swift 4.0) by Apple, containing a complete guide and a language reference, in one of five formats.
Here are some links to tutorials, articles and other resources. If you find something interesting, please add it to our community.