A quick cheat sheet and reference guide for Apple's Swift language. This guide intends to cover all the key features of Swift, including Strings, Arrays, Dictionaries and Flow Control. Swift is a new programming language for developing iOS and OS X apps that was introduced by Apple in June 2014. Variables var myInt = 1 var myExplicitInt: Int = 1 // explicit type var x = 1, y = 2, z = 3 // declare