The numbers 0, 1, 2, 3, and 4 are classified as whole numbers.
Whole numbers include all the natural numbers (which are 1, 2, 3, 4, …) along with the number 0. Therefore, 0 is considered a whole number, even though it is not a natural number. This makes the set of whole numbers {0, 1, 2, 3, 4, …}.
Additionally, these numbers can also be described as integers. Integers consist of whole numbers and their negative counterparts. However, since 0, 1, 2, 3, and 4 are all non-negative, they fit perfectly in the whole numbers category.
In summary, 0, 1, 2, 3, and 4 are whole numbers and also fall under the umbrella of integers.