Factorial Operation
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See: Mathematical Operation, Factorial, Exponentiation Operation.
References
2011
- http://en.wikipedia.org/wiki/Factorial
- QUOTE: In mathematics, the factorial of a non-negative integer [math]\displaystyle{ n }[/math], denoted by n!, is the product of all positive integers less than or equal to n. For example [math]\displaystyle{ 5 ! = 5 \times 4 \times 3 \times 2 \times 1 = 120 \ }[/math]
- QUOTE: The value of 0! is 1, according to the convention for an empty product.