# Lowercase

`import { Lowercase } from "destack:types";`

Map each string in `S` to its lowercase form.

```ds title="Lowercase"
export type Lowercase<S: string> = intrinsic
```

[language/library/src/types/string.ds:7](https://github.com/destack-sh/destack/blob/main/language/library/src/types/string.ds#L7)