6_2_factorial_function.cpp

#include<iostream>
using namespace std;

int fact(int n){
    int factorial=1;
    for(int i=2;i<=n;i++){
        factorial*=i;
    }
    return factorial;
}


int main(){

    int n;
    cin>>n;

    int ans=fact(n);
    cout<<ans;

    return 0;
}