求1+(1+2)+(1+2+3)+...+(1+2+3..+100)

import java.util.Scanner;
public class For02{
    public static void main(String[] args){
    
    //Scanner myScanner = new Scanner(System.in);
    System.out.println("求1+(1+2)+(1+2+3)+...+(1+2+3..+100)");
    
    //int num = myScanner.nextInt();
    int sum=0;
    int su=0;
    for(int num=1;num<=3;num++){
        //1+(1+2)+(1+2+3)=10
        sum += num;
        su += sum;

    }
    System.out.println("su:"+su);
    
    
    
    
    } //结束主方法
                                          
}