Simple math recursion

Calculating a Factorial The factorial of a positive integer is defined as the product of the integer and the positive integers less than the integer. Example: 5! = 5 * 4 * 3 * 2 * 1 Written as a general equation for a positive integer n: n!=n∗(n−1)∗(n−2)∗…∗1n! = n * (n - 1) * (n - 2) * ldots * 1n!=n∗(n−1)∗(n−2)∗…∗1 The above formula for the factorial of n results in a recursive formula: n...