Kids Mathematics - Representation of Whole Numbers on a Number Line

We can represent whole numbers on a geometrical line. This line is called a number line.
Example : We draw a line and mark a point 'O' on this line. We represent the point 'O' by the number '0'

Starting from O, we mark the points A, B, C, D, etc. on the right of it such that
               OA = AB = BC = CD = DE = ....... =  1 unit
Hence,
OA = 1 unit,
OB = OA + OB = (1 + 1) units = 2 units
OC = OB + BC = (2 + 1) units = 3 units and so on.

Properties of the Whole Numbers on a Number Line
1. The number '0' is the least whole number.

2. There is no whole number on the left of '0' and every whole number on the right of '0' is greater than it.

3. Every whole number on the  number line is greater than every whole number on its left.

4. There are infinitely many whole numbers.