C++ Factorial loop recursion

factorial.cpp

#include<iostream>

int RecursiveFactorial(int number)
{
	if (number < 0) throw std::invalid_argument("Negative number is not allowed.");
	if (number == 0) return 1;
	return number * RecursiveFactorial(number - 1);
}

int LoopedFactorial(int number)
{
	if (number < 0) throw std::invalid_argument("Negative number is not allowed.");

	int total = 1;
	for (int n = number; n >= 0; n--)
	{
		if (n == 0) total *= 1;
		else total *= n;
	}
	return total;
}


int main()
{
	for (int i = 0; i < 5; i++)
	{
		std::cout << i << "! = " << LoopedFactorial(i) << " , " << RecursiveFactorial(i) << std::endl;
	}
	return 0;
}