Factorial in C++

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#include<iostream>
using namespace std;

int factorial(int x) {
    if (x == 0) {return 1;}
    else { return (x * factorial(x - 1)); }
}
    int main()
    {
        int x;
        cout << "Enter the number to take the factorial : ";
        cin >> x;
        cout << x << "! = " << factorial(x) << endl;
    }