Question

* Please write the answer without the explanation.

* Please star with Public class.

Write a program that asks the user to enter two positive integers (input validation), then the program should pass the numbers to the method to display all even numbers between those two integers inclusive in the following format.

If enter 11 and 18, the output should be: (12, 14, 16, 18)

Answer 1

Explanation::

• Code in JAVA is given below
• Please read comments for better understanding of the code
• Screenshots of the OUTPUT are given at the end of the code

Code in JAVA::

import java.util.Scanner;

public class EvenNumbers {

   public static void main(String[] args)throws Exception {
       /*
       * We are using Scanner class to take input from the user
       * **/
       Scanner sc=new Scanner(System.in);
      
       /**
       * Two integer variables are declared to store lower and higher value
       * */
       int lower,higher;
      
       /**
       * Prompting user to enter positive values
       * If user enters negative value for lower then
       * We ask again to enter the value of lower
       * */
       while(true) {
           System.out.print("Enter value of lower for the range : ");
           lower = sc.nextInt();
           if(lower>=0) {
               break;
           }
           System.out.println("Please enter positive value for lower.");
       }
       /**
       * Prompting user to enter value that is greater then lower
       * */
       while(true) {
           System.out.print("Enter value of higher for the range : ");
           higher = sc.nextInt();
           if(higher>lower) {
               break;
           }
           System.out.println("Please enter value greater then lower.");
       }
      
       /**
       * Now that we have both valid inputs let's call the function to
       * print only positive value
       * */
       System.out.println(" The outpur is:");
       displayEven(lower,higher);

   }

   private static void displayEven(int lower, int higher) {
       /**
       * First we print the open bracket (
       * */
       System.out.print("(");
      
       /**
       * Then we run the for loop that start from
       * lower to hogher both inclusive
       * */
       for(int i=lower;i<=higher;i++) {
           /**
           * To check if current value of i is even
           * we must see if remainder is 0 when i is divided by 2
           * */
           if(i%2==0) {
               /**
               * Here in if we check if current i is equal to higher
               * or higher-1, if so then which means we are at last number.
               * So we must print the number and closing bracket )
               * */
               if(higher==i || higher-1==i) {
                   System.out.print(i+")");
               }else {
                   /**
                   * Else we just print the number along with comma
                   * */
                   System.out.print(i+", ");
               }
           }
       }/*For loop ends here*/
       System.out.println();
      
   }/*displayEven function ends here*/
  
}/*class ends here*/

OUTPUT::

TEST CASE 1:

TEST CASE 2:

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