[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) › NonNaNNumber

```ts
const NonNaNNumber: nonNaN(Number);
```

Defined in: [packages/common/src/Type.ts:7873](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L7873)

[Number](https://evolu.dev/docs/api-reference/common/Type/variables/Number) other than `NaN`; infinities are allowed.

This is useful for arithmetic that deliberately saturates infinities to a
boundary but cannot assign a meaningful boundary to `NaN`. Excluding `NaN`
also makes ordering and clamping reliable because comparisons with `NaN` are
always false and most arithmetic propagates it.