The hole set of irrational and rational numbers is the set of real numbers and is representing by R. Thus, the real numbers can also be describe in terms of position of a point on the real line (is the number line wherein the position of a point belongs to the origin (i.e. 0) shows a unique real number and vice versa). All the numbers given so far follow the order property i.e. if there are two numbers a & b then either a < b or a = b or a > b