Integers

On the most basic level, the natural numbers are the "counting numbers." For example:

$$1, 2, 3, 4, 5, 6...$$

The whole numbers are very similar but the number $0$ is added:

$$0, 1, 2, 3, 4, 5, 6...$$

The integers are the whole numbers with one important addition. The negative counterparts are included:

$$...-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6...$$