Question

3. Write a Java method (called sumOfSquares) that reads in a sequence of integer numbers using a Scanner object. As each integer is read, the method displays that integer. The method also accumulates the sum of the squares of the integers and displays the sum when all integers are read. The method reads integers until a negative integer is read. The negative integer should not be display or added to the sum of squares. The method will not return a value.

The method should create a Scanner object

Scanner in = new Scanner(System.in);

and then use the nextInt() method to read the numbers

number = in.nextInt();

For instance, if the user types the numbers (1, 2, 3, 4, 5, -1), your method should display the first five numbers and the value 55.

Answer 1

import java.util.Scanner;
public class SumOfSquares1 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int sum = 0, n;

        System.out.println("Enter numbers");
        n = in.nextInt();
        while(n>0){
            sum += (n*n);
            n = in.nextInt();
        }
        System.out.println("Sum of squares is "+sum);
    }
}

$\color{blue}\underline{Output:}$

Enter numbers -1 Sum of squares is 55 Process finished with exit code 0