Gain insights into Haskell's functional programming by learning to write pure functions, use pattern matching, recursion, and Lists, define data types, and execute IO operations.

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ghci

Functional programming is a problem-solving paradigm that differs drastically from the imperative programming style of languages like C++ or Java. While functional programming principles have invaded most modern programming languages to some degree, there is no language that embraces this paradigm quite as Haskell does. As a result, Haskell code can reach a level of expressiveness, safety, and elegance that is difficult to achieve in other programming languages.

This course will introduce you to the core concepts of functional programming in Haskell. You will learn how to write pure functions using techniques such as pattern matching and recursion, and how to work with Haskell's powerful List data type. You will understand the basics of Haskell's powerful type system and define your own data types. Finally, you’ll learn how to perform IO operations the Haskell way. By the end of this course, you’ll have a new paradigm to add under your belt and you can start using functional programming in your own projects.

Learn Functional Programming in Haskell

Apart from the arithmetic operators `+`, `-`, `*`, `/`, there are quite a few useful predefined functions for working with numbers. These functions live in a predefined Haskell module called **Prelude**. When starting `ghci`, it loads the Prelude module by default, which is why you also see it displayed in the prompt of `ghci`.

Once again, here is a terminal widget, which you can use to run `ghci` and try out the functions introduced in this lesson.

Learn about a few useful built-in functions for numbers.

Introduction

First Steps with Haskell

Techniques for Writing Functions

Working with Lists

Creating Data Types

Input and Output

Conclusion

Appendix

Predefined Functions on Numbers