Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc. for iOS, macOS, watchOS, tvOS, Linux, and z/OS. 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. It is built with the open source LLVM compiler framework. Features: - Compile and run your program - View program output or detailed error - Advanced source code editor with syntax highlighting, bracket completion and line numbers - Open, save, import and share Swift files. - Language reference - Customize the editor Limitations: - Internet connection is required for compilation - Maximum program running time is 20s - Only one file can be run at a time - Some file system, network and graphics functions may be limited - This is a batch compiler; interactive programs are not supported. For example, if your program provides an input prompt, enter the input in the Input tab prior to compilation.