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Factorial is a function applied to natural numbers greater than zero. The symbol for the factorial function is an exclamation mark after a number, like this: 2!
Formula
${n! = 1 times 2 times 3 … times n}$
Where −
-
${n!}$ = represents factorial
-
${n}$ = Number of sets
Example
Problem Statement:
Calculate the factorial of 5 i.e. 5!.
Solution:
Multiply all the whole numbers up to the number considered.
${5! = 5 times 4 times 3 times 2 times 1 , \[7pt]
, = 120}$
, = 120}$
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