> For the complete documentation index, see [llms.txt](https://aup.nomi.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://aup.nomi.dev/the-language/types-and-values/booleans.md).

# Booleans

To present boolean value, we have two keywords: `true` and `false`.

```d
puts true     // true
puts false    // false
```