# Output

## Function
 output is used to write values to the console. It is often used to debug scripts, view running results, or generate command line output.

## print
`print` outputs content without automatic line wrapping.

### Syntax

```bt
print(value)
print value
```

### Examples

```bt

// Output: Hello (with a space at the end)
print('Hello ')

// Output: BT
print('BT')

// Output: Hello (with a space at the end)
print 'Hello '

// Output: BT
print 'BT'
```

## println
`println` outputs the content and breaks the line at the end, which is more suitable for debugging and logging.

### Syntax

```bt
println(value)
println value
```

### Examples

```bt
println('Hello BT')
println 'Hello BT'
```

## echo
`echo` is a system output function, which will convert all parameters into strings, connect them with spaces and output them.

### Syntax

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

### Examples

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

## Return Value
 `print` and `println` are language output statements, which will return the output value; `echo` is a system function, and `empty` will be returned after the output is completed.