The book is intended for self-study of Swift, a new programming language for iOS and OS X. Swift 2.0 is described. The material is built on the principle of lighter to complex, the presentation is accompanied by a large number of code listings, a new fast development environment Playground is used for testing and debugging. The basics of Swift, the syntax of the language and its features are explained. Describes data types, conditional expressions, loops, arrays, functions, tuples, base operators, and other standard constructs. The basics of object-oriented programming are briefly given. More complex or Swift-specific constructs are discussed in detail: enumerations, closures, optional types, classes, structures, built-in and generalized types, extensions, protocols, extended operators, etc. For programmers.