## isLowerCase() function

**Signature:**

```typescript
export declare function isLowerCase(c: string): boolean;
```

## Parameters

| Parameter | Type   | Description |
|-----------|--------|-------------|
| c         | string |             |

**Returns:**

boolean

- [isLowerCase() function](/content/docs/sdk/core.islowercase#islowercase-function/index.html)  
- [Parameters](/content/docs/sdk/core.islowercase#parameters/index.html)