calculator

import java.util.*;
public class MyProgram
{
    public static void main(String... args)
    {
        //setting up variables
        boolean bRestart = false;
        double starting = 1;
        double num1;
        double num2;
        double output;
        int operator = 0;
        Scanner input = new Scanner(System.in);
        //the whole loop
        System.out.println("henlo!");
        while (starting > 0)
        {
            //initialization
            System.out.println("num 1 pls");
            num1 = input.nextDouble();

            System.out.println("thanks. 2nd number also");
            num2 = input.nextDouble();

            System.out.println("ok cool. now the operation.");
            System.out.println("1 for addition,");
            System.out.println("2 for subtraction, ");
            System.out.println("3 for multiplication, ");
            System.out.println("and 4 for division.");
            operator = input.nextInt();
            System.out.println(operator);
            System.out.println("alrighty");
            //mathematical times
            if (operator == 1)
            {
                output = (num1+num2);
                for (int i = 0; i < 15; i++)
                {
                    System.out.println();
                }
                System.out.println(num1);
                System.out.println("+");
                System.out.println(num2);
                System.out.println("=");
                System.out.println(output);
                System.out.println( );

            }
            if (operator == 2)
            {
                output = (num1-num2);
                for (int i = 0; i < 15; i++)
                {
                    System.out.println();
                }
                System.out.println(num1);
                System.out.println("-");
                System.out.println(num2);
                System.out.println("=");
                System.out.println(output);
                System.out.println( );
                System.out.println( );
                System.out.println( );
            }
            else if (operator == 3)
            {
                output = (num1*num2);
                for (int i = 0; i < 15; i++)
                {
                    System.out.println();
                }
                System.out.println(num1);
                System.out.println("*");
                System.out.println(num2);
                System.out.println("=");
                System.out.println(output);
                System.out.println( );
            }
            else if (operator == 4)
            {
                if (num2 != 0)
                {
                    output = (num1/num2);
                    for (int i = 0; i < 15; i++)
                    {
                        System.out.println();
                    }
                    System.out.println(num1);
                    System.out.println("/");
                    System.out.println(num2);
                    System.out.println("=");
                    System.out.println(output);
                    System.out.println( );
                }
                else
                {
                    for (int i = 0; i < 15; i++)
                    {
                        System.out.println();
                    }
                    System.out.println("wait a second");
                    System.out.println("dude what the hecc");
                    System.out.println("don't divide by zero");
                }

            }
            //redo machine
            System.out.println("oki doki");
            System.out.println("wanna go again? true/false");
            bRestart = input.nextBoolean();
            if (!bRestart)
            {
                starting = 0;
            }
            else if (bRestart)
            {
                starting++;
                System.out.println("k here we go");
            }
        }
    }
}