Java给定一个正整数n，求1+2+3+...+n之和并输出。

package com.haitong.homeworktwo;

import java.util.Scanner;

public class One {
    public static void main(String[] args) {
        System.out.println("请输入一个数：");
        Scanner scanner = new Scanner(System.in);
        int number = scanner.nextInt();
        int sum = 0;
        for(int i = 0 ;i<=number;i++){
            sum += i;
        }
        System.out.println("1~"+number+"的和为："+sum);
    }
}