What is Ones' complement?
The '''One's complement''' is an operation that can be done to [[binary]] [[number]]s. It is obtained by swapping all the [[bit]]s in the number, that is, replacing ''1'' with ''0'', or ''0'' with ''1''. In many systems, this is used to represent the inverse of a number. One of the big problems that occur when using One's complement is that the number zero has two representations, either all 0's or all 1's. Using 4 digits both ''0000'' and ''1111'' represent zero. This problem can be solved by using [[Two's complement]]. {{math-stub}} [[Category:Binary arithmetics]]