# crypto.uuid

## Function

Generate UUID v4 string.

## Syntax

```bt
crypto().uuid()
```

## Parameters

None.

## Return value

| Type | Description |
| ------ | ------ |
| String | UUID v4 string. |

## Code Example

```bt
id = crypto().uuid()

// Example output: 550e8400-e29b-41d4-a716-446655440000
print id
```

## Notes

- uuid does not rely on the text passed in during crypto construction.