@ISSPACE[string]: Returns 1 if string is entirely composed of white space characters (0x09 - 0x0D or 0x20); 0 otherwise.

 

See also: @ISALNUM, @ISALPHA, @ISASCII, @ISCNTRL, @ISDIGIT, @ISPRINT, @ISPUNCT, @ISXDIGIT.

 

Example:

 

echo %@isspace[   ]

1

 

echo %@isspace[hello world]

0