Question: I need to write a function using C++ to calculate n! the product of all positive integers from 1 to n. n! = 1 *

I need to write a function using C++ to calculate n! the product of all positive integers from 1 to n.

n! = 1 * 2 * ..( n-1) * n

I need a Recursive and an Iterative version and need to test both versions for n = 2, n=3, and n=4.

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