Unsigned Integers
Unsigned integers are unsigned binary numbers contained in a byte, word, doubleword, and quadword.
unsigned byte integer: range from 0 to 255;
unsigned word integer: from 0 to 65,535;
unsigned doubleword integer: from 0 to 2^32– 1 (4,294,967,296-1);
unsigned quadword integer: from 0 to 2^64– 1 (約42億*42億);
Signed Integers
Signed integers are signed binary numbers held in a byte, word, doubleword, or quadword.
Integer values range
from –128 to +127 for a byte integer,
from –32,768 to +32,767 for a word integer,
from –2^31 to +2^31 – 1 for a doubleword integer.
from –2^63 to +2^63 – 1 for a quadword integer.
