Whole Numbers

If we add '0' (zero) to the set of natural numbers, then those set of numbers become whole numbers.
The whole numbers set is an infinite set and is denoted by W.
Thus, W = {0, 1, 2, 3, 4, 5, 6, 7, 8, . . .} = N ∪ {0}
where ∪ represents "union" of two sets.

Representation of whole numbers on number line:
Like natural numbers, we may represent whole numbers by points on the number line, as shown below:

Points to remember
• Every natural number is a whole number.
• '0' is a whole number which is not a natural number.
Example: In a game of cricket, are these subsets of natural numbers set (N) or whole numbers set (W) ?
a) Runs scored by a batsman in several innings.
b) Runs given away by a bowler in an over.
For solution refer to adjacent table.