Representations of signed numbers In binary systems, an n-bit string can represent 2n different numbers 01234567 4-3210123 000001010011100101110111????000001010011 3-bit string unsigned numbers 3-bit string signed numbers Unsigned: 0--2n-1 Signed:-(2n--1-2n--1Representations of signed numbers In binary systems , an n-bit string can represent 2n different numbers ! Unsigned: 0—2 n -1 signed: -(2n-1 -1)—2 n-1 -1