OCaml

OCaml is a general-purpose, high-level, multi-paradigm programming language which extends the Caml dialect of ML with object-oriented features. OCaml was created in 1996 by Xavier Leroy, Jérôme Vouillon, Damien Doligez, Didier Rémy, Ascánder Suárez, and others. Wikipedia

Created Year: 1996
Designed by: Institut National de Recherche en Informatique et en Automatique • Damien Doligez
Developed by: Xavier Leroy
Operating systems: Unix-like operating system
Implemented in: C • OCaml
Named after: Caml
File extensions: ml, mli

Wikidata: Q212587

Influenced: ATS • Boomerang • Elm • F* • Frenetic • F# • Gleam • Hack • Opa • Rust • Scala

Influenced by: Standard ML

Programming paradigms: object-oriented programming • modular programming • functional programming • imperative programming

Language types: functional programming language • multi-paradigm programming language • object-based language • imperative programming language

➡️ Influence Network Poster

➡️ Functional Programmer Humor

OCaml Influence Network

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Hello World in OCaml

print_string "Hello World\n"

Source: github.com/leachim6/hello-world

Free OCaml books, articles, documentation

Architecture of Advanced Numerical Analysis Systems: Designing a Scientific Computing System using OCaml - Liang Wang, Jianxin Zhao (PDF)
Developing Applications With Objective Caml
Functional Programming in OCaml - Michael R. Clarkson
Learn Programming with OCaml: Algorithms and Data Structures - Sylvain Conchon, Jean-Christophe Filliâtre - trl.: Urmila Nair (PDF)
OCaml From the Ground Up - Daniil Baturin (HTML) ( :construction: in process)
OCaml from the Very Beginning - John Whitington
OCaml Scientific Computing - Liang Wang, Jianxin Zhao (HTML) ( :construction: in process)
Real World OCaml
Think OCaml - Allen B. Downey, Nicholas Monje
Unix System Programming in OCaml - Xavier Leroy, Didier Rémy (HTML, GitHub Repo)
Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa - Didier Rémy

Source: github.com/EbookFoundation/free-programming-books

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Latest data update: 2026-09-24