When we say numbers, we may mean an integer or a fraction. Numbers are classified into whole numbers, natural number, integers, complex numbers etc. Integers are those which are the positive and negative numbers including zero on the number line. Where as the whole numbers are those which are positive integers including 0. What are counting numbers? Are the whole numbers and counting numbers same? Why do we call them as counting numbers? In this section let us see how the numbers are classified and why we call them as counting numbers.