java序列求和

import java.util.Scanner;
public class a17 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("输入一个数");
         int n = sc.nextInt();
         int sum = 0;
         for(int i = 1;i<= n;i++) {
             sum += i;
         }
         System.out.println(sum);
    }
}

java序列求和

原文：https://www.cnblogs.com/dasugaigf1/p/14155563.html