> For the complete documentation index, see [llms.txt](https://learnyouahaskell.mno2.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learnyouahaskell.mno2.org/zh-cn/ch09.md).

# ch09

- [输入与输出](https://learnyouahaskell.mno2.org/zh-cn/ch09/input-and-output.md)