> For the complete documentation index, see [llms.txt](https://gitbook.existorlive.cn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.existorlive.cn/kai-fa-yu-yan-xue-xi/swift/3.-zi-fu-chuan-he-zi-fu.md).

# 3.字符串和字符

- [字符串](https://gitbook.existorlive.cn/kai-fa-yu-yan-xue-xi/swift/3.-zi-fu-chuan-he-zi-fu/1.-zi-fu-chuan.md)
- [字符串操作](https://gitbook.existorlive.cn/kai-fa-yu-yan-xue-xi/swift/3.-zi-fu-chuan-he-zi-fu/2.-zi-fu-chuan-cao-zuo.md)