F# is designed to make functional programming practical and accessible, especially for developers working on the .NET platform. This book will get you started. In F# in Action you will learn how to: Write performant and robust systems with succinct F# code Model domains quickly, easily and accurately with F#'s type system Design solutions using functional programming patterns Ingest and process disparate data sources Develop data-driven web applications Unit test F# code Effectively model data using a variety of techniques Use scripts to rapidly explore domains About the technology F# is a simple, robust, and highly performant programming language. It lets you keep your code simple in even the most complex applications, and its language core is perfect for learning the fundamentals of functional programming. F# runs on .NET, so you can work cross-platform and take advantage of battle-tested .NET components. It's succinct and flexible - perfect for everything from command line tools, to web apps, to data analysis and machine learning.