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Clojure

A robust, practical, and fast programming language combining approachability of scripting,

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Clojure is a dynamic, general-purpose programming language and Lisp dialect that runs on the JVM. It is compiled while remaining fully dynamic at runtime, and it addresses problems around concurrency and mutable state by emphasizing functional programming with immutable, persistent data structures. When mutable state is required, it provides software transactional memory and an asynchronous Agent system to support consistent multithreaded designs.

Core capabilities include dynamic development, runtime polymorphism through protocols, datatypes, and multimethods, and a macro system built on code-as-data. Clojure compiles functions to JVM bytecode, shares the JVM type system, garbage collection, and threads, and offers direct access to Java libraries and interfaces with optional type hints and type inference. Related implementations include ClojureScript and ClojureCLR.

Clojure is aimed at developers building general-purpose applications on the JVM, particularly those needing functional programming and concurrency support alongside existing Java code and libraries. It is distributed as open source under an EPL license; no paid editions, trials, or seat-based plans are described.

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