# path.extension

## Function

Returns the path extension.

## Syntax

```bt
path(text).extension()
```

## Parameters

None.

## Return value

| Type | Description |
| ------ | ------ |
| String | Extension; if there is no extension, an empty string is returned. |

## Code Example

```bt
result = path('root/docs/index.md').extension()

// Output: md
print result
```

## Notes

- The return value does not contain a period.