Question

Write a JAVA program that prompts the user for student grades and displays the highest and lowest grades in the class. The user should enter a character to stop providing values.

Starter code:

import java.util.Scanner;

public class MaxMinGrades{

  public static void main(String[] args){

    Scanner input = new Scanner(System.in);

    System.out.println("Enter as many student grades as you like. Enter a character to stop.");

    double grade = input.nextDouble();

    double minGrade = Double.MAX_VALUE;

    double maxGrade = Double.MIN_VALUE;

    while (Character.isDigit(grade)) {

      if (grade == 0) {

          break;

      }

      if (grade < minGrade) {

          minGrade = grade;

      }

      if (grade > maxGrade) {

         maxGrade = grade;

      }

    }

    System.out.println("The highest grade is: " + maxGrade);

    System.out.println("The lowest grade is: " + minGrade);

  }

}

Answer 1

import java.util.Scanner;

public class MaxMinGrades{
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        System.out.println("Enter as many student grades as you like. Enter a character to stop.");
        int grade = input.nextInt();
        double minGrade = Double.MAX_VALUE;
        double maxGrade = Double.MIN_VALUE;
        while (!Character.isDigit(grade)) {
            if (grade == 0) {
                break;
            }

            if (grade < minGrade) {
                minGrade = grade;
            }

            if (grade > maxGrade) {
                maxGrade = grade;
            }
            try {
                grade = input.nextInt();
            }
            catch (Exception ex){
                break;
            }
        }
        System.out.println("The highest grade is: " + maxGrade);
        System.out.println("The lowest grade is: " + minGrade);
    }
}