> For the complete documentation index, see [llms.txt](https://www.introtoc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.introtoc.com/session-4.md).

# Session 4

- [session4.c](https://www.introtoc.com/session-4/session4.c.md)