Question

In java, write a program that gets 10 integer numbers from the user using user input, and then calculates and display the sum of the numbers that have been read.  

Program Requirements:

Write the program in three versions with three loops. Put all three loops in the main method of your source code. The program must be in one file.

1. version1:  use a while loop.
2. version2:  use a do-while loop.
3. version 3:  use a for loop.

For each version, use a loop to input 10 int numbers from the user and calculate the sum.  Then display the sum on the console window.

Answer 1

Program Screenshot:

Sample output:

Code to copy:

import java.util.Scanner;

public class Sum10Integers

{

     public static void main(String[] args)

     {

          Scanner sc = new Scanner(System.in);   

          // Using while loop

          int i = 0, sum = 0;

          while (i < 10)

          {

              //get 10 integer numbers from the user

              //find sum

              sum += sc.nextInt();

              i += 1;

          }

          //print sum.

          System.out.println(sum);

          // Using do-while loop

          i = 0; sum = 0;         

          do

          {

              //get 10 integer numbers from the user

              //find sum

              sum += sc.nextInt();

              i += 1;

          }while (i < 10);

          //print sum.

          System.out.println(sum);

          // Using for loop

          sum = 0;

          for ( i = 0; i < 10; i++)

          {

              //get 10 integer numbers from the user

              //find sum

              sum += sc.nextInt();

          }

          //print sum.

          System.out.println(sum);

     }

}