Number System

1. Natural Numbers/ Counting Numbers (N) :

1,2,3,4,5,6,7,8,9,…

2. Whole Numbers (W):

0,1,2,3,4,5,6,7,8,9,…

3. Integers (I or Z):

…,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,…

Integers

4. Rational Numbers:

The numbers whose decimal fraction is (1) Non terminating and (2) Non recurring are irrational numbers.