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# average

> Calculates the average of an array of numbers.

## Signature

```typescript path=null start=null theme={null}
average(arr: number[]): number
```

## Parameters

* **arr**: `number[]` - The array of numbers.

## Returns

`number` - The average of the array of numbers.

## Source

Defined in [number.ts:67](https://github.com/koji/ichigyou/blob/main/src/number.ts#L67)