java递归N的阶乘

import java.util.Scanner;
public class Test32{
    public static void main (String [] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int sum=factorial(n);
        System.out.println("sum="+sum);
        sc.close();
    }
    public static int factorial(int n){
        if(n==1){
            return 1;
        }return n*factorial(n-1);
    }
}