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

```ts
const nonPositive: BrandFactory<"NonPositive", number, NonPositiveError>;
```

Defined in: [packages/common/src/Type.ts:7759](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L7759)

Number [Brand](https://evolu.dev/docs/api-reference/common/Brand/interfaces/Brand) requiring a value less than or equal to zero.

### Example

```ts

const NonPositive = nonPositive(Number);

assertOk(NonPositive.fromUnknown(0), 0);
```