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3 August, 20:55

What is a factorial and what is the purpose of it?

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  1. 3 August, 21:43
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    Step-by-step explanation:

    Factorial is used to multiply any natural number with all the numbers smaller than it. It is denoted by n! (n is the natural number)

    where n! = n * (n-1) * (n-2) * (n-3) * (n-4) so on ...

    For example if we take factorial of 5.

    Then,

    5! = 5 * (5-1) * (5-2) * (5-3) * (5-4)

    = 5*4*3*2*1

    = 120

    It is used for the questions which asks us to order a number of things or in how many ways you can arrange something ...
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