Thread: High / low integer computation algorithm????

Okay, you guys were awesome , last time, here I am again, stuck. I am writing an exam averager, using a do-while loop with an if/else thrown in there. Its functional, but I also need it to display the highest and the lowest integer entered by the user. I have laid out a double highScore and double lowScore for the values to be assigned to, but I can't figure out how to make the program identify the highest and lowest values entered.

I think it will be something like an "if / else-if" type of loop inside the already established if / else loop, but I don't know what to tell it to look for. any guidance??? Code attached...

import java.util.Scanner;
/**computes the average of a user entered list of non-negative integers.  
 *Will repeat until user idcated to stop. Will indicate largest / smallest integer.
 */
 public class ExamAverager
 {
 	public static void main (String [] args)
 	{
 		System.out.println ("This program will compute the average of a list of");
 		System.out.println ("non-negative test scores.");
 		double sum;
 		int numberOfStudents;
 		double next;
 		double highScore;
 		double lowScore;
 		String answer;
 		Scanner keyboard = new Scanner (System.in);
 		do
 		{	
 			System.out.println ();
 			System.out.println ("Enter all of the scores to be averaged.");
 			System.out.println ("Enter a negative number when complete, to see results.");
 			sum = 0;
 			numberOfStudents = 0;
 			next = keyboard.nextDouble ();
 			while (next >= 0)
 			{
 				sum = sum + next;
 				numberOfStudents++;
 				next = keyboard.nextDouble ();	
 			}
 			if (numberOfStudents >= 0)
 				System.out.println ("The average is " + (sum / numberOfStudents));
 			else 
 				System.out.println ("No scores to average.");
 			System.out.println ("Do you want to enter another test score?");
 			System.out.println ("Enter yes or no.");
 			answer = keyboard.next ();
 		}	
 		while (answer.equalsIgnoreCase ("yes"));
 	}
 }