[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:7805](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L7805)

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);
```