This easy-to-use, fast-moving tutorial introduces you to functional programming with Haskell. Learn how to use Haskell in a variety of practical ways, whether it's for short, script-like programs or large and demanding applications. Written for experienced programmers, "Real World Haskell" takes you through the basics of functional programming at a brisk pace, and helps you increase your understanding of Haskell in real-world issues like I/O, performance, dealing with data, concurrency, and more as you move through each chapter. With this book, you will: understand the difference between procedural and functional programming; learn about Haskell's compiler, interpreter, values, simple functions, and types; find your way around Haskell's library - and write your own; use monads to express I/O operations and changes in state; interact with databases, parse files and data, and handle errors; discover how to use Haskell for systems programming; and, learn concurrency and parallel programming with Haskell. You'll find plenty of hands-on exercises, along with examples of real Haskell programs that you can modify, compile, and run. If you've never used a functional language before, and want to understand why Haskell is now coming into its own as a practical language in so many major organizations, "Real World Haskell" is the place to start.