The CHAR Function
The CHAR function returns a one-character alphanumeric value that is a character
in the program collating sequence having the ordinal position equal to the
value of argument-1. The type of this function is alphanumeric.
General Format

Arguments
- Argument-1 must be an integer.
- The value of argument-1 must be greater than zero and less than or equal
to the number of positions in the collating sequence.
Returned Values
- If more than one character has the same position in the program collating
sequence, the character returned as the function value is that of the first
literal specified for that character position in the ALPHABET clause.
- If the current program collating sequence was not specified by an ALPHABET
clause, the native collating sequence is used.