Sample SWIFT File Download

Swift is Apple's programming language for iOS, macOS, watchOS, and tvOS development, and a .swift file is plain-text Swift source code, typically written and compiled inside Xcode.

Compared to Objective-C, which it was designed to replace, Swift favors safer defaults — optional types that force you to handle the "no value" case explicitly, and strict type checking that catches whole categories of bugs at compile time rather than at runtime.

The sample below is real Swift source, useful for testing a syntax highlighter, static analyzer, or file-type detector against Apple's specific language syntax rather than a generic C-like-language assumption.