How do you evaluate factorials?

1 Answer
Alan P.
Feb 13, 2015

Factorials
Note that factorials are only defined for integers >= 0
The factorial of n is written n!

n! = (n) xx (n-1) xx (n-2) xx ... xx (1)

So, for example:
5! = 5 xx 4 xx 3 xx 2 xx 1 = 120

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