pls explain the procedure asked 05 Jul '13, 21:47

binary equivalent of a decimal number is normally represented as 2's complement of the number. eg. consider negative of 7. the binary equivalent of 5 is 0101 (4 bit representation). to calculate 2's complement, we first invert all the digits and then add 1 to it. so negative is invert(0101)+1 = 1010 + 1= 1011. the first bit is 1 which shows the number is negative. the restriction is that for 4 bit numbers, only 3 bits are used to represent the magnitude of the number while the first bit shows sign (0  positive, 1  negative). i suggest you google it for more info. eg for 2, 2 is represented as 0010. so 2 = 1101+1= 1110. answered 05 Jul '13, 23:01
