> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/y.md).

# Y

- [Y combinator](https://trizen.gitbook.io/sidef-lang/programming_tasks/y/y_combinator.md)
- [Yin and yang](https://trizen.gitbook.io/sidef-lang/programming_tasks/y/yin_and_yang.md)