如何在C＃中获得一列数字的总和

Question

I have a simple program to write in my c# class and I cant figure out the last part. I have to write out all even numbers from 0 - 20 in a column and then have another column of the square values and one more column of the cube values. I have got all that working. I then need the sums of each column at the end, but cant seem to figure it out.

Any help would be appreciated. My code is included below.

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

namespace COMP2614Assign01
{
class Program
{
    static void Main(string[] args)
    {
        string formatStringHeading = "{0,5} {1, 10} {2, 10:N0}";

            Console.WriteLine(formatStringHeading
                ,"number"
                ,"square"
                ,"cube"
                 );
         Console.WriteLine(new string('-', 28));

         int e = 0;

         while (e <= 20)
         {
             int e1 = e * e;
             int e2 = e * e * e;
             Console.WriteLine(formatStringHeading
                 ,e
                 ,e1
                 ,e2);
             e += 2;
         }
         Console.WriteLine(new string('-', 28));


    }
}

}

Answer 1

int e = 0;
int eSum = 0, e1Sum = 0, e2Sum = 0;

while (e <= 20)
{
    eSum += e;
    int e1 = e * e;
    e1Sum += e1;
    int e2 = e * e * e;
    e2Sum += e2;
    Console.WriteLine(formatStringHeading
        ,e
        ,e1
        ,e2);
    e += 2;
}
Console.WriteLine(new string('-', 28));
Console.WriteLine(formatStringHeading
    ,eSum
    ,e1Sum
    ,e2Sum);