Как вычислить факториал в с++?

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

#include 
using namespace std;

int main() {
    int n, factorial = 1;
    cout << "Enter a number: ";
    cin >> n;

    for (int i = 1; i <= n; i++) {
        factorial *= i;
    }

    cout << "Factorial of " << n << " is " << factorial << endl;
    return 0;
}

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20

#include 
using namespace std;

int factorial(int n) {
    if (n == 0) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
}

int main() {
    int n;
    cout << "Enter a number: ";
    cin >> n;

    int result = factorial(n);
    cout << "Factorial of " << n << " is " << result << endl;
    return 0;
}