a number that comes naturally

a number that occurs commonly and obviously in nature, a whole, non-negative number

a number from the set of numbers {1, 2, 3, 4,…}. The natural numbers are the positive integers.

The natural numbers (also called counting numbers) are the positive whole numbers, 1, 2, 3, 4, 5... . Mathematicians usually include the number zero with the natural numbers.

A counting number; 1, 2, 3, 4, and so on.

A counting number; a positive integer.

Positive integers (1, 2, 3, 4. . . .)

In mathematics, a natural number can mean either an element of the set , , , ...} (i.e the positive integers) or an element of the set , , , , ...} (i.e. the non-negative integers). The former is generally used in number theory, while the latter is preferred in mathematical logic, set theory and computer science. See below for a formal definition.