# Bound

`import { Bound } from "destack:range";`

One endpoint of a range.

```ds title="Bound"
export newtype Bound<T> = { kind: "included"; value: T } | { kind: "excluded"; value: T } | { kind: "unbounded" }
```

[language/library/src/range/bound.ds:5:8](https://github.com/destack-sh/destack/blob/main/language/library/src/range/bound.ds#L5-L8)