Question

what is the value of factorial of zero?​

Answer 1

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It is pretty clear from these examples how to calculate the factorial of any whole number greater than or equal to one, but why is the value of zero factorial one despite the mathematical rule that anything multiplied by zero is equal to zero? The definition of the factorial states that 0! = 1.

Answer 2

The answer is

Factorial of (0) is 1

Factorial (0) = 1