# BT.has_env

## Function

 determines whether the current valid environment variable exists.

## Syntax

```bt
BT.has_env(name)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| name | String | Yes | None | Environment variable name. |

## Return Value

| Type | Description |
| ------ | ------ |
| Bool | Returns true if a valid environment variable exists, otherwise returns false. |

## Examples

```bt
BT.set_env('BT_MODE', 'dev')
result = BT.has_env('BT_MODE')

// Output: true
print result
```

## Notes

- Variables obscured by the remove_env delete flag are considered non-existent.