In general, functional languages prefer recursion, mapping, and folding to iteration; purely functional languages such as Haskell lack loop constructs entirely.

Functional programming has been around for the last 60 years, but so far it’s always been a niche phenomenon. Although game-changers like Google rely on its key concepts, the average programmer ...

Haskell is good at this because it’s a “ purely functional programming language.” In essence, you build programs around a series of functions, and each function can operate independently of ...

Haskell is a purely functional programming language that is used to ensure reliability especially in such fields as finance or medicine. The software written in Haskell is secure and scalable, and ...

Don’t just take my word for it, though: Stack Exchange has an informative thread about functional programming with local mutable variables. Refactor #2: A pre-Java 8 functional Sort application ...

Scala is an easy transition for those familiar with Java and object-oriented programming. But if you want to learn the basics of functional programming, Scheme is hands-down the best.

You see, we don’t get functional programming by starting with an imperative language and cutting off its legs. A purely functional subset of Java or C or Python would be miserable little languages.