Functional programming is based on mathematical functions. Some of the popular functional programming languages include: Lisp, Python, Erlang, Haskell, Clojure, etc. This tutorial provides a brief overview of the most fundamental concepts of functional programming languages in general.

Begin with simple concepts like using functions that don't change data, and understanding how `map()` and `filter()` work. This approach helps break down problems into smaller, more manageable parts. ### What is the easiest functional programming language? Elm is often seen as one of the easiest languages for beginners.

Functional programming languages are specially designed to handle symbolic computation and list processing applications. Functional programming is based on mathematical functions. Some of the popular functional programming languages include: Lisp, Python, Erlang, Haskell, Clojure, etc.

This is why functional programming is often referred to as “pure programming!" Functions run as if they are evaluating mathematical functions, with no unintended side effects. When you have such small, pure functions, you can often reuse them much more easily than your traditional object-oriented program.