Clean

Clean is a general-purpose purely functional programming language. Originally called the Concurrent Clean System or the Clean System, it has been developed by a group of researchers from the Radboud University in Nijmegen since 1987. Although development of the language has slowed, some researchers are still working in the language. In 2018, a spin-off company was founded that uses Clean. Wikipedia

Created Year: 1987

Wikidata: Q377986

Influenced: Haskell • Idris

Programming paradigms: functional programming • purely functional programming

Language types: purely functional programming language • non-strict programming language

Clean Influence Network

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Hello World in Clean

module hello
Start :: {#Char}
Start = "Hello World"

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Latest data update: 2026-07-11