BMICalc

import java.util.Scanner;

public class BMI {
    public static void main(String []args) {

        Scanner scan = new Scanner(System.in);
        char goAgain;
        String name;
        double weight, height, bmi;

        do {

            System.out.print("How many entries? ");
            int numOfEntries = scan.nextInt();

            while (numOfEntries < 1) {
                System.out.println("Invalid entry.");
                System.out.print("How many entries? ");
                numOfEntries = scan.nextInt();
            }

            String[] entryName = new String[numOfEntries];
            double[] entryWeight = new double[numOfEntries];
            double[] entryHeight = new double[numOfEntries];

            for (int i = 0; i < numOfEntries; i++) {
                System.out.print("Enter name of entry: ");
                name = scan.next();
                entryName[i] = name;

                System.out.print("Enter your weight in lbs. ");
                weight = scan.nextDouble();

                while (weight < 0) {
                    System.out.print("Enter weight again! ");
                    weight = scan.nextDouble();
                }
                entryWeight[i] = weight;

                System.out.print("Enter your height in inches. ");
                height = scan.nextDouble();
                while (height < 0) {
                    System.out.print("Enter height again! ");
                    height = scan.nextDouble();
                }
                entryHeight[i] = height;
            }


            for (int j = 0; j < numOfEntries; j++) {
                System.out.printf("\nName: %s \nHeight: %,.2f inches \nWeight: %,.2f lbs \nBMI: " +
                                "%,.2f\n",
                        entryName[j], entryHeight[j], entryWeight[j], (entryWeight[j] * 703) / (Math.pow(2, entryHeight[j])));
            }

            System.out.print("\nGo again? ");
            goAgain = scan.next().charAt(0);

        } while (goAgain == 'y' || goAgain == 'Y');
    }
}