grade program arrays

import java.util.Random; class justrandom{ public static void main(String[] args) { Random dice = new Random(); double[] allgrades = new double[20]; double sum = 0; double average = 0; double low = 100; double high = 0; for(int counter=1; counter< 20;counter++){//loop that generates rand number 20 times int number = 60+dice.nextInt(40); allgrades[counter] = number;//numbers are now held in array } for (int hilow = 1; hilow < 20; hilow++) { //2nd loop for hilow values double sumhelper = allgrades[hilow]; sum += sumhelper; if (allgrades[hilow] > high) { //finds high high = allgrades[hilow]; } if (allgrades [hilow] < low) { //finds low low = allgrades[hilow]; } } average = sum/20.0; System.out.println("Average is " + average + " High is " + high + " Low is " + low); //final output } }