[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) › negative

```ts
const negative: BrandFactory<"Negative", number, NegativeError>;
```

Defined in: [packages/common/src/Type.ts:6431](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L6431)

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

### Example

```ts

const Negative = negative(Number);

assertOk(Negative.fromUnknown(-1), -1);
```