The format for the $ZCHAR() function is:
$ZCH[AR](intexpr[,...])
The integer expression(s) specify the numeric byte value of the byte(s) $ZCHAR() returns.
Note 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.