# has_env

## Function

Determine whether the specified variable exists in the user's global environment.

## Syntax

```bt
has_env(name)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| name | String | No | '' | The name of the user global variable to check. |

## Return value

| Type | Description |
| ------ | ------ |
| Bool | Returns true if the user global variable exists, otherwise returns false. |

## Example

```bt
name = 'BT'
result = has_env('name')

// Output: true
print result
```

## Notes

- Only check the global variable table.