재귀함수를 이용한 팩토리얼 구현

package afternoon;

public class Factorial {

static int num = 5;

public static void main(String[] args) {

// TODO Auto-generated method stub

System.out.println("factorial "+num+" = "+factorial(num));

}

private static long factorial(int i) {

// TODO Auto-generated method stub

if(i==1)

return 1;

else

return i * factorial(i-1);

}

}