# Functions

<a id="isboolean"></a>

##  isBoolean

▸ **isBoolean**(value: *`any`*): `boolean`

*Defined in [is/boolean.ts:20](https://github.com/polkadot-js/common/blob/477be90/packages/util/src/is/boolean.ts#L20)*

*__name__*: isBoolean

*__signature__*: isBoolean (value: any): boolean

*__summary__*: Tests for a boolean value.

*__description__*: Checks to see if the input value is a JavaScript boolean.

*__example__*:   

```javascript
import { isBoolean } from '@polkadot/util';

isBoolean(false); // => true
```

**Parameters:**

| Name | Type |
| ------ | ------ |
| value | `any` |

**Returns:** `boolean`

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