Q:

java loop array using do...while

This program should take a user defined number, create an array of that size and let the user input the elements - which are grades - using a do..while loop. The program then needs to display all grades entered from lowest to highest, accumulate the grades, and find the average.
My output isn't displaying the entered grades correctly (if I enter 10,20,30, it displays 00,10,20) and I can't figure out what I'm doing wrong. Any help, please?
import java.util.Arrays;
import java.util.Scanner;

public class LoopArray
{
    public static void main(String[] arg)
    {
        Scanner keyboard = new Scanner(System.in);

        int count = 0;
        double totalAverage = 0;
        double gradesTotal = 0;

        System.out.println("Please input the number of grades you would like to submit for an average: ");
        int numberOfGrades = keyboard.nextInt();                 

        int[] studentScores = new int[numberOfGrades];

        do
        {
            System.out.println("Please enter grade for averaging: ");
            int inputGrade = keyboard.nextInt();
            count++;
            gradesTotal += inputGrade;

        } while (count < numberOfGrades);

        Arrays.sort(studentScores);

        for(count=0; count < studentScores.length; count++)
        {
           System.out.println("Grades entered were: " + count + studentScores[count]);
        }

        totalAverage = gradesTotal / numberOfGrades;
        System.out.println("The total of all grades entered is: " + gradesTotal);
        System.out.println("The average of grades entered is: " + totalAverage);

    }
}

A:

You are not putting any value inside the array. You need to add this to your do part of the loop studentScores[count] = inputGrade;
Now your do while loop should look like this:
do
    {
        System.out.println("Please enter grade for averaging: ");
        int inputGrade = keyboard.nextInt();
        studentScores[count] = inputGrade;
        count++;
        gradesTotal += inputGrade;

    } while (count < numberOfGrades);

Also, inside your last for-loop, you are printing extra info. Just remove that count from System.out.println
 System.out.println("Grades entered were: " + studentScores[count]);

Anything you don't understand let me know thanks

