C++ Program to Find Factorial of a Number

Here I have shared the factorial program in C++. A Factorial is the product of a number and all the numbers below it.

For example, the factorial of 4! = 4 × 3 × 2 × 1 = 24.

#include<iostream>

using namespace std;

int main()
{     
	unsigned long i,fac,n;
	cout<<"Enter number: ";
	cin>>n;

	for(i=1,fac=1;i<=n;++i)
	{
		fac=i*fac;
	}

	cout<<"Factorial of "<<n<<" is: "<<fac;
	return 0;
}

Output:

Enter number: 5
Factorial of 5 is: 120

If you have any problem regarding the below factorial program in C++ then you can freely ask it by commenting below.