> For the complete documentation index, see [llms.txt](https://freebsdfrau.gitbook.io/serious-shell-programming/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions.md).

# String Functions

- [substr](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/substr.md)
- [sprintf](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/sprintf.md)
- [replace](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/replace.md)
- [replaceall](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/replaceall.md)
- [replacestart](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/replacestart.md)
- [replaceend](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/replaceend.md)
- [fnmatch](https://freebsdfrau.gitbook.io/serious-shell-programming/string-functions/fnmatch.md)