# docs.ruby-lang.org

> Official documentation site for the Ruby programming language: the Japanese
> Ruby reference manual (Rurema), the English API documentation generated by
> RDoc for each Ruby version, and the C API documentation.

- The Japanese manual covers Ruby 1.8.7 through the current development
  version. `/ja/latest/` always points to the latest stable version and is the
  canonical URL of each page.
- The English documentation is generated from the Ruby source tree by RDoc.
  `/en/master/` follows the development version.
- The Japanese manual is licensed under CC BY 3.0. The English documentation
  is generated from the Ruby source and follows its license.

## Japanese Reference Manual (Rurema)

- [Version index](https://docs.ruby-lang.org/ja/): documented Ruby versions
- [Table of contents (latest stable)](https://docs.ruby-lang.org/ja/latest/doc/index.html)
- [Library index](https://docs.ruby-lang.org/ja/latest/library/index.html): built-in and standard libraries
- [Class index](https://docs.ruby-lang.org/ja/latest/class/index.html): all documented classes and modules
- [Search](https://docs.ruby-lang.org/ja/search/): name search across all versions
- [Sitemap](https://docs.ruby-lang.org/ja/latest/sitemap.xml)
- [License](https://docs.ruby-lang.org/ja/latest/doc/license.html)

## English Documentation (RDoc)

- [Version index](https://docs.ruby-lang.org/en/)
- [Ruby 4.0 (latest stable)](https://docs.ruby-lang.org/en/4.0/)
- [Ruby master](https://docs.ruby-lang.org/en/master/)
- [Sitemap](https://docs.ruby-lang.org/en/sitemap.xml)

## C API Documentation

- [C API of Ruby master (Doxygen)](https://docs.ruby-lang.org/capi/en/master/)
- [Sitemap](https://docs.ruby-lang.org/capi/en/master/sitemap.xml)

## Optional

- [Privacy policy](https://docs.ruby-lang.org/privacy.html)
- [Source repositories of the Japanese manual](https://github.com/rurema): rurema/doctree (content) and rurema/bitclust (generator)