# isNumber

**Kind:** Function

**Source:** [`packages/common/utils/shared.utils.ts`](https://github.com/nestjs/nest/blob/master/packages/common/utils/shared.utils.ts#L46)

**Part of:** [Common](subsystem-packages-common)

## Signature

```ts
function isNumber(val: any): val is number
```

## Parameters

| Name | Type |
|---|---|
| `val` | `any` |

**Returns:** `val is number`

## Used by

3 references from 3 files. Each is a place in this repository where the symbol is actually used — go read one rather than trusting an example.

### Imported by (3)

- `EventPattern` — `packages/microservices/decorators/event-pattern.decorator.ts`:21
- `GrpcMethodStreamingType` — `packages/microservices/decorators/message-pattern.decorator.ts`:22
- `transformPatternToRoute` — `packages/microservices/utils/transform-pattern.utils.ts`:21