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Write a function in C++ called 'factorial' that will take a positive integer as input and returns its factorial. In math, a factorial is...
X538: Factorial C++
Write a function in C++ called 'factorial' that will take a positive integer as input and returns its factorial. In math, a factorial is the product of all positive integers less than or equal to a given positive integer. If the integer is zero, the factorial is 1.
For example, calling factorial(3); should calculate 3x2x1 and return 6.
Examples:
factorial(0) -> 1
factorial(3) -> 6
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