Explanation

A cardinal number is a number that is used to indicate quantity, such as the number of items in a set or group. The set of cardinal numbers is also known as the natural numbers. Cardinal numbers are usually represented by the symbol "N" and include the numbers 1, 2, 3, 4, 5, and so on, without any limit.

An example of a cardinal number is the number of students in a class, or the number of books in a library.