> For the complete documentation index, see [llms.txt](https://haskell.hpmeducation.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://haskell.hpmeducation.com/functors-applicatives-and-monads/introduction.md).

# Introduction

In this chapter, we explore the more advanced topics of Haskell - **functors, applicative functors** and **monads*****.*** These three concepts are [type classes](/type-classes/introduction.md) in Haskell that generalise ideas of **function mapping**, **function application** and **programming with effects**, respectively.