# fs.extension

## Function

Returns the path extension.

## Syntax

```bt
fs(path).extension()
```

## Parameters

No parameters.

## Return value

| Type | Description |
| ------ | ------ |
| String | Returns the extension without the dot. |

## Example

```bt
file = fs('/var/log/app.log')
result = file.extension()

// Output: log
print result
```

## Notes

- Returns an empty string if the path has no extension.