@print <value>
print a string to the screen, can print array also
$arr:[1,2,3]
@print $arr
> arr:
> [
> 0 => 1
> 1 => 2
> 2 => 3
> ]
@echo <value>
print a string to the screen
@echo hello
> hello
@shell <string>
exec a command on OS
$str:@shell ls
@print $str
> arr:
> [
> stdout => Documents Downloads file.
> stderr =>
> exit_code => 0
> ]
@input
read string from input
$a: @input
echo $a
< abc
> abc