# fs.append

## Function

Append the content to the end of the file.

## Syntax

```bt
fs(path).append(content)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| content | Any | No | '' | Content to append; arrays and objects write JSON strings. |

## Return value

| Type | Description |
| ------ | ------ |
| Int | Returns the number of bytes written this time. |

## Example

```bt
file = fs('docs-append.txt')
file.write('BT')
result = file.append(' Lang')

// Output: 5
print result
```

## Notes

- File is created if it does not exist.