Page 61 - CTS - CSA TP - Volume 2
P. 61

COMPUTER SOFTWARE APPLICATION - CITS




           EXERCISE 87 : Use the Do … While and While – do loops


            Objectives

           At the end of this exercise you shall be able to
           •  know the syntax of  while and do…while loops and its use
           •  develop Java programs using while and do…while loops.

           Requirements

           Tools/Materials
           •   PC/Laptop with Window OS
           •   JDK Software
           •  Text editor (Visual studio / Sublime  / Note pad)

           Procedure

           Both do-while and while loops are control flow structures in Java used for repetitive execution of a block of code.
           They differ primarily in when the loop condition is evaluated.
           TASK  1: Sum of numbers using a do-while loop
           import java.util.Scanner;
           public class DoWhileSum {
           public static void main(String[] args) {
                Scanner scanner = new Scanner(System.in);
           int sum = 0;
           int number;
           do {
           System.out.print(“Enter a number (enter 0 to exit): “);
           number = scanner.nextInt();

           sum += number;
                } while (number != 0);
           System.out.println(“Sum of entered numbers: “ + sum);
           scanner.close();
               }
           }
           Output:
















           This program uses a do-while loop to repeatedly prompt the user to enter numbers until they enter 0. It calculates
           and prints the sum of all entered numbers



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