[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) › nonNaN

```ts
const nonNaN: BrandFactory<"NonNaN", number, NonNaNError>;
```

Defined in: [packages/common/src/Type.ts:6478](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L6478)

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

### Example

```ts

const NonNaN = nonNaN(Number);

assertOk(NonNaN.fromUnknown(Infinity), Infinity);
```