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Reason (programming language)

Reason, also known as ReasonML, is a programming language and toolchain that is part of the OCaml programming language ecosystem. Reason uses many syntax elements from JavaScript, compiles to native code using OCaml's compiler toolchain, and can compile to JavaScript using the Melange compiler.

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Key facts & relationships

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Designed by
Jordan Walke
Family
ML: Caml: OCaml
Filename extensions
.re, .rei
First appeared
May 16, 2016; 10 years ago (2016-05-16)
License
MIT
Paradigms
Multi-paradigm: functional, imperative, modular, object-oriented

Topics to explore

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Overview

Language characteristics

History

Advanced semantic analysis

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Map overview Semantic statistics

Reason (programming language)

Nodes19
Edges18
Triples8
Avg. degree1.89
Density0.105263
Components1

How this topic connects Entity context

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Reason (programming language)

Top relations

Designed by · 1
Reason (programming language) → Jordan Walke
Family · 1
Reason (programming language) → ML: Caml: OCaml
Filename extensions · 1
Reason (programming language) → .re, .rei
First appeared · 1
Reason (programming language) → May 16, 2016; 10 years ago (2016-05-16)
License · 1
Reason (programming language) → MIT
Paradigms · 1
Reason (programming language) → Multi-paradigm: functional, imperative, modular, object-oriented
Stable release · 1
Reason (programming language) → 3.18.0 / June 23, 2026; 2 months ago (June 23, 2026)
Website · 1
Reason (programming language) → reasonml.github.io

Important terminology Word statistics

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Important terminology

reason javascript ocaml syntax toolchain bucklescript language ecosystem also melange functional rescript uses compiles first reasonml compiler object-oriented team programming

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Reason (programming language)Designed byJordan Walke1.00infobox
Reason (programming language)FamilyML: Caml: OCaml1.00infobox
Reason (programming language)Filename extensions.re, .rei1.00infobox
Reason (programming language)First appearedMay 16, 2016; 10 years ago (2016-05-16)1.00infobox
Reason (programming language)LicenseMIT1.00infobox
Reason (programming language)ParadigmsMulti-paradigm: functional, imperative, modular, object-oriented1.00infobox
Reason (programming language)Stable release3.18.0 / June 23, 2026; 2 months ago (June 23, 2026)1.00infobox
Reason (programming language)Websitereasonml.github.io1.00infobox

Related concept clusters Concept neighborhoods

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    Connections between topic areas Semantic bridges

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