Swift is a multi-paradigm, compiled programming language created by Apple Inc. for iOS and OS X development. Introduced at Apple's 2014 Worldwide Developers Conference (WWDC), Swift is designed to work 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 to erroneous code ("safer") than Objective-C, and also more concise. It is built with the LLVM compiler framework included in Xcode 6, and uses the Objective-C runtime, allowing C, Objective-C, C++ and Swift code to run within a single program, but its proprietary nature may hinder Swift's adoption outside the Apple ecosystem.
Swift is a replacement for the Objective-C language that employs contemporary programming language theory concepts and strives to present a simpler syntax. During its introduction, it was described simply as "Objective-C without the C".