# base64.encode

## Function

Encode the text stored in base64(text) into a Base64 string.

## Syntax

```bt
base64(text).encode(mode)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| mode | Int | No | 0 | Coding table: 0 `BASE64_STANDARD`, 1 `BASE64_STANDARD_NO_PAD`, 2 `BASE64_URL_SAFE`, 3 `BASE64_URL_SAFE_NO_PAD`. |

## Return value

| Type | Description |
| ------ | ------ |
| String | Returns the encoded Base64 string. |

## Example

```bt
result = base64('BT').encode()

// Output: QlQ=
print result
```

## Notes

- Input text is encoded in UTF-8 bytes.