class FakultetsfunksjonenLoekke {


    public static void main(String[] args) {

        for (int i = 1; i <= 20; i++){
            System.out.println(i + "! = " + fakultet(i));
        }
    }

    public static long fakultet(int n){

        long tmp = 1;

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

            tmp = tmp * i;
        }

        return tmp;
    }
}

































/*
int verdi = 1;

for (int i = 1; i <= tall; i++){
    verdi = verdi * i;
}

return verdi;
*/