Question

Use java

to find the sum of the following series (up to N terms). The program should    display the terms:

             2² + 4² + 6²…

For example, if N=4, then the program should display the following terms:

                          2² + 4² + 6² + 8²

Sum of terms = 120   

(So How I can get 2² + 4² + 6² + 8²   _{for the output . the answer is not only for the sum of terms =120 can you explain how you do it as well?) thank you.}

Answer 1

import java.util.Scanner;

public class SumNTerms {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a value for n: ");
        int n = in.nextInt();
        int total = 0;
        for (int i = 1; i <= n; i++) {
            System.out.print((2*i) + "^2");
            if (i != n) {
                System.out.print(" + ");
            }
            total += (2*i)*(2*i);
        }
        System.out.println(" = " + total);
    }
}