Sometimes it is useful for a process to be able to increment characters like numbers, e.g. when creating multiple files with the same name (My_File_a, My_File_b etc.).
Let's assume that the index (initial character) is kept in the %Char% variable.
var c = '%Char%'; var ret = String.fromCharCode(c.charCodeAt(0) + 1); WScript.Echo(ret);
Note: It is the developer's responsibility to make the necessary checks before running this code; cases such as 'z', 'Z', text strings, or non-letter inputs should be accounted for to ensure that the Process behaves as expected.