Question

​​​​​​​For java program.

1. Write a while loop that will let the user enter a series of integer values and compute the total values and number of values entered. An odd number will stop the loop. Display the number of iterations and the total of the values after the loop terminates.

for Loop

2. Write a for loop to display all numbers from 13 - 93 inclusive, ending in 3.

3. Write a for loop to display a string entered by the user backwards.

do Loop

4. Write a do .. loop for the random number dice problem from Chap Three. Add a counter variable that is used to count the number of times this code is executed in the loop and stops after 5 times.

roll = rand.nextInt(6) + 1;

      System.out.println(" Roll = " + roll);

ctr++;

Here is a sample output display:

The rolls are:

Roll = 3

Roll = 1

Roll = 4

Roll = 6

Roll = 4

Add a loop structure using the while loop and then add a for loop. The program should include 3 loops that do the same thing. What is the “best” loop structure to use for this problem and why?

Answer 1

Please find the answer below.
Please do comments in case of any issue. Also, don't forget to rate the question. Thank You So Much.

package c13;

import java.util.Scanner;

public class AddNumbers {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       int sum=0;
       int count=0;
       int input;
       while(true) {
           System.out.print("Enter number : ");
           input = sc.nextInt();
           if(input%2!=0) {
               break;
           }
           count++;
           sum +=input;
       }
       System.out.println("Total number of iteration : "+(count+1));
       System.out.println("Total number entered : "+(count));
       System.out.println("Total of the numbers is : "+sum);
   }
}

2)

package c13;

public class Main {
   public static void main(String[] args) {
       for(int i=13;i<=93;i+=10)
           System.out.println(i);
   }
}

3)

package c13;

import java.util.Random;

public class Main {
   public static void main(String[] args) {
       int roll;
       int ctr=1;
       Random rand = new Random();
       do {
           roll = rand.nextInt(6) + 1;
           System.out.println(" Roll = " + roll);
           ctr++;
       }while(ctr<=5);
   }
}