Creates a character c with the value specified by the 2-digit ASCII hexadecimal number whose digits are hi and lo. For example, if hi = 'E' or 'e' and lo = '9', c will be 0xE9.
most significant hexadecimal digit (ASCII)
least significant hexadecimal digit (ASCII)
output character
true on success or false if hi or lo or both are not a hexadecimal digit.
See Implementation
Creates a character c with the value specified by the 2-digit ASCII hexadecimal number whose digits are hi and lo. For example, if hi = 'E' or 'e' and lo = '9', c will be 0xE9.