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Crystal is a high-level general-purpose, object-oriented programming language, designed and developed by Ary Borenszweig, Juan Wajnerman, Brian Cardiff and more than 400 contributors. With syntax inspired by the language Ruby, it is a compiled language with static type-checking, but specifying the types of variables or method arguments is generally unneeded. Types are resolved by an advanced global type inference algorithm. Crystal is currently in active development. It is released as free and open-source software under the Apache License version 2.0. Wikipedia

Created Year: 2014
Developed by: Ary BorenzweigManas Technology Solutions
Operating systems: LinuxOpenBSDQ34236WebAssemblymacOS
Aliases: Crystal Language, Crystal Lang
File extensions: cr

Wikidata: Q21921428

Influenced by: CC#GoPythonRubyRust

Programming paradigms: concurrent computingmulti-paradigm programmingobject-oriented programming

Language types: object-based language

Crystal Influence Network

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Hello World in Crystal

puts "Hello World"

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Latest data update: 2025-08-15