# echo

## Function

Convert all parameters to strings, concatenate them with spaces and output them to the console.

## Syntax

```bt
echo(value1, value2, ...)
echo value
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| valueN | Any | No | None | The value to output. |

## Return value

| Type | Description |
| ------ | ------ |
| Empty | Returns Empty after output is complete. |

## Example

```bt
echo('BT', 1)
echo 'BT'

// Output: BT 1

// Output: BT
```

## Notes

- Fixed inserting a space between multiple parameters.
- The bracketless syntax only supports one expression parameter; please use the function form for multiple parameters.
- When `empty` is actively output, it will be displayed as `empty` to facilitate troubleshooting of missing values.