[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Number](https://evolu.dev/docs/api-reference/common/Number) › isBetween

```ts
function isBetween(min: number, max: number): Predicate<number>;
```

Defined in: [packages/common/src/Number.ts:219](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Number.ts#L219)

Creates a predicate that checks if a number is within a range, inclusive.

### Example

```ts

const isBetween10And20 = isBetween(10, 20);

assertTrue(isBetween10And20(20));
assertFalse(isBetween10And20(25));
```