I'm incredibly new to writing Java code (using Netbeans, by the way). For my assignment, I have to use arrays to calculate the sum, average, largest, and smallest of any number of test scores. In addition, I have to use a "for loop" to tally up the number of A'S, B'S, C'S, D'S, and F'S (ex. "The number of students with scores of 90-100 (A) is 4", etc. for each letter grade) based on the test scores. All this has to be shown in a message box. I have a message box that will come up to let the user input how many test scores there will be, and what they are. I can calculate the sum, average, largest, and smallest parts of this assignment, but I can't get the latter half of the assignment done right. Instead of "The number of students with scores of 90-100 (A) is(insert calculated number here)" showing up, I get "The number of students with scores of 90-100 (A) is0", and this happens for each letter grade I'm trying to determine. I'm not sure why the0is showing up. Here is my code:

import javax.swing.JOptionPane; public class ArrayProject3 { public static void main(String[] args) { String response = JOptionPane.showInputDialog(null, "Number of scores:"); int number = Integer.parseInt(response); int scores[] = new int[number]; for (int a = 0; a < number; a++) { response = JOptionPane.showInputDialog(null, "Enter score " + (a+1)); scores[a] = Integer.parseInt(response); } int count = 0; int gradeA = 0; int gradeB = 0; int gradeC = 0; int gradeD = 0; int gradeF = 0; int sum = 0; int largest = scores[0]; int smallest = scores[0]; for (int i = 0; i < scores.length; i++) { sum = sum + scores[i]; if (scores[i] > largest) { largest = scores[i]; } if (scores[i] < smallest) { smallest = scores[i]; } if (scores[i] <= 90 && scores[i] >= 100){ gradeA = count++;} if (scores[i] <= 80 && scores[i] >= 89){ gradeB = count++;} if (scores[i] <= 70 && scores[i] >= 79){ gradeC = count++;} if (scores[i] <= 60 && scores[i] >= 69){ gradeD = count++;} if (scores[i] <= 60){ gradeF = count++;} } JOptionPane.showMessageDialog(null, "The sum is " + sum + "\nThe average is " + (sum / scores.length) + "\nThe largest is " + largest + "\nThe smallest is " + smallest + "\nThe number of students with scores of 90-100 (A) " + gradeA + "\nThe number of students with scores of 80-89 (B) " + gradeB + "\nThe number of students with scores of 70-79 (C) " + gradeC + "\nThe number of students with scores of 60-69 (D) " + gradeD + "\nThe number of students with scores below 60 (F) " + gradeF); } }