# Math Joke

In mathematics, the **factorial** of a non-negative integer *n*, denoted by *n*!, is the product of all positive integers less than or equal to *n*. For example: 4! = 1 x 2 x 3 x 4 = 24

**factorial** of a non-negative integer *n*, denoted by *n*!, is the product of all positive integers less than or equal to *n*. For example: 4! = 1 x 2 x 3 x 4 = 24