# Functions

<a id="randomasu8a"></a>

##  randomAsU8a

▸ **randomAsU8a**(length?: *`number`*): `Uint8Array`

*Defined in [random/asU8a.ts:22](https://github.com/polkadot-js/common/blob/3ee9e13/packages/util-crypto/src/random/asU8a.ts#L22)*

*__name__*: randomAsU8a

*__signature__*: randomAsU8a (length?: number = 32): Uint8Array

*__summary__*: Creates a Uint8Array filled with random bytes.

*__description__*: Returns a `Uint8Array` with the specified (optional) length filled with random bytes.

*__example__*:   

```javascript
import { randomAsU8a } from '@polkadot/util-crypto';

randomAsU8a(); // => Uint8Array([...])
```

**Parameters:**

| Name | Type | Default value |
| ------ | ------ | ------ |
| `Default value` length | `number` | 32 |

**Returns:** `Uint8Array`

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