Swift is a multi-paradigm, compiled programming language developed by Apple for iOS and OS X development. Introduced at Apple's developer conference WWDC 2014, Swift is designed to replace Objective-C, Apple's object-oriented language, while working with Apple's Cocoa and Cocoa Touch frameworks and the large body of existing Objective-C code written for Apple products.

Swift is intended to be more resilient against erroneous code. It is built with the LLVM compiler included in Xcode 6 beta, and uses the Objective-C runtime, allowing Objective-C, Objective-C++ and Swift code to run within a single program.