Learn OCAML with Real Code Examples
Updated Nov 20, 2025
Installation Setup
Install OCaml via OPAM (OCaml Package Manager)
Use official OCaml compiler or native build tools
Install an IDE/editor (VS Code with OCaml plugin, Emacs, Vim)
Set up PATH and environment variables
Test installation with ocamlc -version
Environment Setup
Install OCaml via OPAM
Set PATH to OCaml binaries
Install dune build system
Configure IDE/editor with Merlin
Test REPL with simple expressions
Config Files
dune-project for build config
dune files for source compilation
OPAM files for package dependencies
.ml/.mli source and interface files
Test scripts and documentation
Cli Commands
ocamlc file.ml -o output
ocamlopt file.ml -o native_output
dune build
opam install package
utop (interactive REPL)
Internationalization
Supports Unicode and UTF-8 encoding
Libraries available for locale-specific formatting
Used globally in academia and industry
Documentation translated in multiple languages
Compatible with multi-language datasets
Accessibility
Cross-platform support (Linux, macOS, Windows)
OPAM package manager for easy library access
Extensive documentation and tutorials
Active developer community
Lightweight compiler and runtime
Ui Styling
No native GUI; use bindings for web or desktop apps
Console outputs via print functions
Web frontends via BuckleScript/Js_of_ocaml
Frameworks like Ocsigen/Dream for web UI
Integration with external libraries for visualization
State Management
Immutable variables by default
Mutable references for stateful programming
Modules encapsulate state and functions
Tail recursion for functional state handling
Exceptions manage error state
Data Management
Lists, arrays, and tuples
Records and variants for structured data
Polymorphic data types
Modules for reusable data structures
Persistent vs mutable data handling