$asc
From Scriptwiki
Returns the ascii number of the character C.
$asc(C)
Example
echo -a $asc(A) ; returns 65.
To get the ascii value of a character, just type:
//echo -a $asc($?)
and type the character, you want the ascii value of, in the coming popup and press enter.
See Also
$chr returns the character of an ascii number.