Write an application that allows a user to enter any number of student quiz scores until the user enters 99. If the score entered is less than 0 or more than 10, display an appropriate message and do not use the score. After all the scores have been entered, display the number of scores entered, the highest score, the lowest score, and the arithmetic average. Save the file as QuizScoreStatistics. java.

The program is an illustration of loops and conditional statements.

Loops are used to execute repetitive operations, while conditional statements are executed based on the truth value of its condition.

The program in Java where comments are used to explain each line is as follows:

import java.util.*;

class Main{

   public static void main(String[] args)  {

       //This creates a Scanner Object

       Scanner input=new Scanner(System.in);

       //This declares and initializes all integer variables

       int num, count =0, sum = 0, max = Integer.MIN_VALUE; int min = Integer.MAX_VALUE;

       //This declares and initializes the average variable

       float avg =0;

       //The following is repeated until the user enters 99

       do{

           //Prompts the user for a score

           System.out.print("Score: ");

           //Get input for score

           num =input.nextInt();

           //Inputs less than 0 or greater than 10 are invalid

           if (num < 0 || num >10){

               System.out.println("Invalid input");

           }

           //For valid inputs

           else{

               //This keeps count of valid inputs

               count++;

               //This adds valid inputs

               sum+=num;

               //This gets the maximum of valid inputs

               if(num > max){

                   max = num;

               }

               //This gets the minimum of valid inputs

               if(num < min){

                   min = num;

               }

           }

       }

       while(num != 99);

       //Calculate average

       avg= sum/count;

       //Print the highest score

       System.out.println("Highest: " +max);

       //Print the least score

       System.out.println("Lowest: "+min);

       //Print the average score

       System.out.println("Average: "+avg);

}

}

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import java.util.Scanner;

import java.util.*;

import java.util.Collections;

class Main

{

public static void main(String[] args)  

{

     List<Integer> Scores = new ArrayList<Integer>();

     Scanner sc1=new Scanner(System.in);

     int i =0;

     int a=0;

     do

     {

       System.out.println("Enter score");

       a =sc1.nextInt();

       if (a <= 0)

       {

           System.out.println("You entered wrong score");

           continue;

       }

       else if ( a < 10 && a >0)

       {

           System.out.println("You entered wrong score");

           continue;

       }

       else

       {

           Scores.add(a);

       }

       i++;

     }while(a!=99);

     int max= Collections.max(Scores);

     int min=Collections.min(Scores);

     int sum=0;

     float averg =0;

     for(i=0; i<=Scores.size()-1;i++)

     {

        sum += Scores.get(i);

     }

     averg= sum/Scores.size();

     System.out.println("Maximum score" +max);

      System.out.println("Minimum score"+min);

     System.out.println("Average:"+averg);

}

}

Explanation:

Remember we need to use Arraylist and not array, as we do not know how many scores we are going to have. And we use Collections for this, where we have functions for finding maximum and minimum for arraylist, however, for average, we need to calculate. However, one should know that Arraylist has better options available as compare to arrays.

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