online factorial calculator.

**How to use :-**Enter the non negative integer number (n) and press the = button:

A factorial is a function that multiplies a number by every number below it. For example 5!= 5*4*3*2*1=120. The function is used, among other things, to find the number of way ��n�� objects can be arranged. ... 0 factorial is a definition: 0!

The factorial formula is:

*n!* = 1⋅2⋅3⋅4⋅...⋅*n*

For example:

3! = 1⋅2⋅3 = 6

4! = 1⋅2⋅3⋅4 = 24

5! = 1⋅2⋅3⋅4⋅5 = 120