C++ Example - Finding the Factorial of a Number
The factorial of a positive integer (English: factorial) is the product of all positive integers less than or equal to that number, and the factorial of 0 is 1. The factorial of a natural number n is written as n!.
Example
#include <iostream>
using namespace std;
int main()
{
unsigned int n;
unsigned long long factorial = 1;
cout << "Enter an integer:";
cin >> n;
for(int i = 1; i <=n; ++i)
{
factorial *= i;
}
cout << n << "'s factorial is:"<< " = " << factorial;
return 0;
}
The output result of the above program execution is:
输入一个整数: 12 12 的阶乘为： = 479001600other extensions