# startsWith

`import { startsWith } from "destack:bytes";`

Return whether `bytes` starts with `prefix`.

```ds title="startsWith"
export function startsWith(bytes: &'a readonly [uint8], prefix: &'b readonly [uint8]): boolean
```

[language/library/src/bytes/bytes.ds:183:185](https://github.com/destack-sh/destack/blob/main/language/library/src/bytes/bytes.ds#L183-L185)