Using recursive method to find the value of 1~n

package com.qfedu.test;

import java.util.Scanner;

// Recursive search  1~n Value 
public class Test3 {
	public static int getsum(int n) {
		if (n==1) {
			return 1;// Recursion ends 
		}
		int temp = getsum(n-1); 
		return temp+n;
	}	


public static void main(String args[]) {
	Scanner input = new Scanner(System.in);
	System.out.println(" Please enter an integer ：");
	int num = input.nextInt();
	int sum= getsum(num);
	System.out.println("sum="+sum);
}
}