Number that is used to count or tally objects in a set.

To write a whole number, we use digits.

### Symbol

The symbol for the set of whole numbers is \(\mathbb{W}\).

### Properties

- The sequence of whole numbers is: \(\mathbb{W}\) = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, …}.
- The number 0 is a whole number.
- The set of whole numbers is an infinite set.
- The set of whole numbers is a closed set for the operations of addition and multiplication.