> For the complete documentation index, see [llms.txt](https://lab.guardianaudits.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lab.guardianaudits.com/encyclopedia-of-common-solidity-bugs/off-by-1.md).

# 1⃣ 1⃣ 1⃣ Off By 1