Returns a string composed of bytes represented by the integer octet values specified in its argument(s).
The format for the $ZCHAR() function is:
The integer expression(s) specify the numeric byte value of the byte(s) $ZCHAR() returns.
GT.M limits the number of arguments to a maximum of 254. $ZCHAR() provides a means of producing byte sequences. In the UTF-8 mode, $ZCHAR() returns a malformed characters for numeric byte values 128 to 255. In the M mode, $ZCHAR() can create valid UTF-8 characters that includes bytes in the range 128-255.
The output of $ZCHAR() for values of integer expression(s) from 0 through 127 does not vary with choice of the character encoding scheme. This is because 7-bit ASCII is a proper subset of UTF-8 character encoding scheme. The representation of characters returned by $ZCHAR() for values 128 through 255 differ for each character encoding scheme.
When used with $ZASCII(), $ZCHAR() can also perform arithmetic operations on the byte values of the bytes associated with a sequence of octets (8-bit bytes).