Definition:Natural Numbers

Informal Definition
The natural numbers are the counting numbers.

The set of natural numbers is denoted $\N$:
 * $\N = \left\{{0, 1, 2, 3, \ldots}\right\}$

The set $\N \setminus \left\{{0}\right\}$ is denoted $\N_{>0}$:
 * $\N_{>0} = \left\{{1, 2, 3, \ldots}\right\}$

The set of natural numbers is one of the most important sets in mathematics.

Also see

 * Definition:Natural Number Addition