MathGloss/F/Factorial

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Factorial

the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.


Examples

1) 3! = 3x2x1=6


2) 4!=4x3x2x1 =24


3) 5! =5x4x3x2x1=120

4) 2! = 2x1 =2


5) 1! = 1

6) 0! = 1