# c++ program to find factorial of a number

#include <iostream>
using namespace std;
int main()
{
unsigned int n;
unsigned long long factorial = 1;
cout << "Enter a positive integer: ";
cin >> n;
for(int i = 1; i <=n; ++i)
{
factorial *= i;
}
cout << "Factorial of " << n << " = " << factorial;
return 0;
}

## Output

Enter a positive integer: 4
Factorial of 4 = 24

## Explanation

- Here variable factorial is of type unsigned long long
- It is because factorial of a number is always positive, that 's why unsigned qualifier is added to it.
- Since the factorial a number can be large, it is defined as long long