it might be a very small bug but i just tried this:
//echo -a $asc(,)
and it returned:
* Too many parameters: $asc
i dont understand how that too many parameters
in addition: can anyone tell me the asci number for , please

It's not a bug at all. The comma character defines parameters, $asc(,) is giving 2 "null" parameters. $asc(,) is the same as $asc($null,$null) If you want to get the ascii code of a comma do, /set %a ,
then //echo -a $asc(%a)

Yeah, a long time ago I had the same problem but making an alias fixes that problem:

/asc { echo -a $asc($1) }

Should work