The absolute complement — or simply complement— of a set $A$ contains all the elements in the universal set that do not belong to $A.$ The complement of $A$ can be denoted as $A^C$ or $A^{\prime }.$ The above set can be read as the set of all numbers $x$ such that $x$ is not an element of set $A.$ In a Venn Diagram, the complement of $A$ is shown by coloring the area outside $A.$ For instance, consider the integer numbers as a universal set. If $A$ is the set of positive integers, then the complement of $A$ contains the negative integers and zero.