Definition of a Factorial
Denoted by the symbol "!" after an integer; the product of that integer and all integers in descent to 1.
Example of a factorial:
5! = 5 x 4 x 3 x 2 x1
5! = 120
0! = 1 1! = 1
Lessons In Electric Circuits copyright (C) 2000-2020 Tony R. Kuphaldt, under the terms and conditions of the CC BY License.
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Revised July 25, 2007
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