A programming paradigm that builds software by composing pure functions, avoiding shared state, mutable data, and side-effects.

"Functional programming languages like Haskell and Scala encourage functions to be first-class and higher-order."

A programming paradigm where programs are constructed by applying and composing functions, avoiding shared state, mutable data, and side-effects.

"Functional programming emphasizes the use of pure functions and higher-order functions to create more predictable and bug-free code."