37 lines
738 B
Markdown
37 lines
738 B
Markdown
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# Functions
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<a id="hexaddprefix"></a>
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## hexAddPrefix
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▸ **hexAddPrefix**(value?: *`string` | `null`*): `string`
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*Defined in [hex/addPrefix.ts:21](https://github.com/polkadot-js/common/blob/8513530/packages/util/src/hex/addPrefix.ts#L21)*
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*__name__*: hexAddPrefix
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*__summary__*: Adds the `0x` prefix to string values.
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*__description__*: Returns a `0x` prefixed string from the input value. If the input is already prefixed, it is returned unchanged.
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*__example__*:
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```javascript
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import { hexAddPrefix } from '@polkadot/util';
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console.log('With prefix', hexAddPrefix('0a0b12')); // => 0x0a0b12
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```
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**Parameters:**
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| Name | Type |
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| ------ | ------ |
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| `Optional` value | `string` | `null` |
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**Returns:** `string`
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___
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