Apple's Swift has far-reaching effects on all platforms, not just iOS, OS X, watchOS and tvOS. Learn why Swift matters, how to use the programming language and how it differs from Objective-C.

Swift Playgrounds is an easy way to learn Swift programming and to test code inside of Xcode, and now the feature is available for iOS 10. Learn how to use the Swift Playgrounds app for iPad.

Use of Swift will be supported as soon as the next version of Xcode is released—it's currently available in beta form to registered developers, and will presumably see more widespread release ...