Hello World Project

The same program, written in 142 different languages.

Browse all 142 languages

---

Overview

This project collects Hello, World! in 142 programming languages — from Python and C to Brainfuck and Shakespeare. Every file prints the same string. The differences are in the syntax.

Use it to look up how a language works, compare two languages side by side, or find something you have not seen before.

Features

What	Details
142 languages	Procedural, OOP, functional, scripting, esoteric, hardware, logic, and markup.
Search	Type a name, find the language. Fuzzy matching included.
Filter	Click a paradigm tag to narrow the grid.
Compare	Pick up to 3 languages and see their code side by side.
Copy and download	One click to copy or download any source file.
Dark and light mode	Follows your system preference. Manual toggle available.
Deep links	Link directly to any language with a URL hash (e.g., #python).
CI/CD	GitHub Actions validates the manifest and deploys to Pages on every push.

Project Structure

Hello-World/
├── docs/
│   ├── hello-world/     Source code files for all 142 languages
│   ├── index.html       Website entry point
│   ├── style.css        Styles and theme system
│   ├── app.js           Application logic
│   ├── languages.json   Language manifest (auto-generated)
│   └── build.py         Build script to regenerate the manifest
├── .github/
│   └── workflows/
│       └── deploy.yml   CI/CD: validation and GitHub Pages deployment
├── CONTRIBUTING.md      Contribution guidelines
├── LICENSE              MIT License
└── README.md

Quick Reference

Language	File	Description
Python	hello.py	High-level, general-purpose language.
JavaScript	hello.js	Primary language of the web platform.
Rust	hello.rs	Memory-safe systems programming.
Go	hello.go	Statically typed with built-in concurrency.
C++	hello.cpp	High-performance compiled language.
Haskell	hello.hs	Purely functional programming.
Java	hello.java	Platform-independent OOP language.
C	hello.c	Foundation of systems programming.

For the full list, visit the interactive site or browse the hello-world/ directory.

Build

Regenerate languages.json from the source files:

cd docs
python build.py

The script scans hello-world/, maps file extensions to language metadata via internal dictionaries, and writes the manifest with paradigm tags.

Contributing

Contributions are welcome. See CONTRIBUTING.md for file naming conventions, paradigm tag definitions, and the pull request process.

Summary:

1. Fork the repository.
2. Create a feature branch: git checkout -b feature/add-language-name.
3. Add the source file to docs/hello-world/.
4. Update the extension mapping in docs/build.py.
5. Run python docs/build.py to regenerate the manifest.
6. Commit, push, and open a pull request.

License

Distributed under the MIT License. See LICENSE for the full text.