Whole Numbers

Whole numbers are a foundational concept in mathematics, encompassing all non-negative integers starting from zero.
Example: 0, 1, 2, 3, 4, ..., 367, 368, ..., 237105, ...

1. A whole number is either 0 or a natural number.
2. The first and the smallest whole number is 0 (zero).
3. It is impossible to obtain the last and greatest whole number. [Like natural numbers, whole numbers are also infinite].
4. The difference between two consecutive whole numbers is 1 (one).
5. By adding 1 to any whole number, its next whole number is obtained.
6. All natural numbers are whole numbers; not all whole numbers are natural numbers.

The number line used to represent whole numbers is as given below:

1. Zero (0) is the smallest whole number.
2. There is no whole number on the left side of 0.
3. Each whole number (apart from 0) is on the right side of 0. 
4. A whole number is
   (a) greater than every whole number on its left.
   (b) smaller than every whole number on its right. 

• Counting empty seats: If no one is present, “0” is a valid count.

• Measuring zero weight on a scale: Zero is meaningful in science and math.

• Bank balance: A balance of ₹0 is still counted as a whole number.

• Whole numbers: 0,1,2,3,...0,1,2,3,...

• First and smallest is 0.

• Used in daily life for counting, inventory, scores, and much more.

• No fractions, negatives, or decimals involved.