This book is a great foundation for exploring functional-first programming and its role in the future of application development. The best-selling introduction to F#, now thoroughly updated to version 4.0, will help you learn the language and explore its new features. F# 4.0 is a mature, open source, cross-platform, functional-first programming language which empowers users and organizations to tackle complex computing problems with simple, maintainable and robust code. F# is also a fully supported language in Visual Studio and Xamarin Studio. Other tools supporting F# development include Emacs, MonoDevelop, Atom, Visual Studio Code, Sublime Text, and Vim. Beginning F#4.0 has been thoroughly updated to help you explore the new features of the language including: Type Providers Constructors as first-class functions Simplified use of mutable values Support for high-dimensional arrays Slicing syntax support for F# lists Reviewed by Don Syme, the chief architect of F# at Microsoft Research, Beginning F#4.0 is a great foundation for exploring functional programming and its role in the future of application development.