Counting numbers are the set of numbers that we use to learn how to count. 1, 2, 3, 4, 5, and so on. They are also called natural numbers—maybe since they feel natural to us because they are naturally the first numbers we learn. Sometimes they are also referred to as positive integers.

Is 4 a counting number?

Any number you can use for counting things: 1, 2, 3, 4, 5, ... (and so on). Does not include zero.

Which number is a counting number?

A positive integer: 1, 2, 3, 4, ... (OEIS A000027), also called a natural number. However, zero (0) is sometimes also included in the list of counting numbers.