Argument-1 must be one character in length and must be class alphabetic, alphanumeric
or national.
Returned Values
If the class of argument-1 is alphabetic or alphanumeric, the returned value is the ordinal position of argument-1 in the current alphanumeric collating sequence for the program.
If the class of argument-1 is national, the returned value is the ordinal position of argument-1 in the current national program collating sequence.
If the class of argument-1 is national, the returned value is the ordinal position of argument-1 in the current national program collating sequence. 