Ending Loop

Question

I have a mortgage calculator that dispalys the monthly payment, principle and interest paid, and principle remaining. The program works great, but doesn't stop at 360 months like is should. Below is the code. How do I get the program to end after 360 months?
Thanks!
import java.text.NumberFormat;
import java.util.Locale;
class Mortgage_Calc
public static void main(String[]arguments)throws Exception{
     //Allows For Currency Format
     NumberFormat formatter = NumberFormat.getCurrencyInstance(Locale.US);
     // Define the variables
     char ans = 'Y';
     double prin;
     double apr;
     double mo_Payments;
     double monthly_Interest;
     double monthlyInterestPaid;
     double monthly_principle;
     // Standard Integers
     int months; // Set months for later calculations
     int term = 30; // Number of Years
     int yearCnt = 1; // Counter for Years to increment in 12 Months (While Loop)
     int yearpluscnt; // Counter for Years (For Loop)
     int mthPaymentNum = 1; // Counter used later
     int max_Months; // Maximum Months
     //hard coded values
     prin = 200000; // Principle Value of the Mortgage
     apr = .0575; // Annual Percentage Rate
     // Calculate Values
     monthly_Interest = (apr / 12); // Monthly Interest Percentage
     months = (term * 12); // Total Amount of Months in the Term
     max_Months = months;
     monthlyInterestPaid =(prin * monthly_Interest); //monthly interst paid
     //Equation to calculate monthly payment
     mo_Payments = (prin * monthly_Interest) / (1-Math.pow(1 + monthly_Interest,- months));
     //monthly payment on the principle calculation
     monthly_principle = (mo_Payments - monthlyInterestPaid); //monthly principle
     // print Payment Summary
     System.out.println("\n\n\t Loan Summary\n");
     System.out.println("\n\n\t The amount of the mortgage is " + formatter.format(prin));
     System.out.println("\t With an annual interest rate of " apr * 100"%");
     System.out.println("\t your monthly payments will be " formatter.format(mo_Payments) " per month");
     System.out.println("\t for a term of "+term+ " years.\n\n");
     System.out.println("\n\t Here is the amortization schedule:");
     //Pause 3 seconds before displaying amortization schedule
     try
     Thread.sleep(3000);
     catch (InterruptedException e) {}
          // Do While Loop
          while(ans=='Y' || ans=='y'){
          // Print Headings
          System.out.println("\t--------------------------------------------------------------");
          System.out.println("\n\t Month \t Priciple Left \t Principle Paid \t Interest Paid\n");
          System.out.println("\t--------------------------------------------------------------");
               // For Loop To print Each Months Numbers
               yearpluscnt=mthPaymentNum+12;
               for (mthPaymentNum = yearCnt; mthPaymentNum < yearpluscnt ; mthPaymentNum++ ){
               //The new principle balance after subtracing from the remainder principle balance
               prin = (prin - monthly_principle);
               months = (months - 1);
               //monthly interest paid calculation
               monthlyInterestPaid = (prin * monthly_Interest);
               //monthly payment on the principle calculation
               monthly_principle = (mo_Payments - monthlyInterestPaid);
                    //Pausing before showing output for 2 seconds
                    try
                    Thread.sleep(50);
               catch (InterruptedException e) {}
               // Output Monthly Payment Information
               System.out.println("\t" + mthPaymentNum + "\t" +
               formatter.format(prin) + "\t" + formatter.format(monthly_principle) +
               "\t\t\t" + formatter.format(monthlyInterestPaid));
          System.out.print("\n\n\tWould you like to Continue? Y or N:");
          ans=(char)System.in.read();
          System.in.read();
          System.in.read();
          yearCnt = yearCnt+12;
          System.out.println("\n");
}

Answer 1

Sorry, I am new to this forum - I don't know the rules yet.
To be more specific, I want my program to stop calculating after 30 years or 360 months.
What do I need to add to make this happen?
import java.text.NumberFormat;
import java.util.Locale;
class Mortgage_Calc
public static void main(String[]args)throws Exception{
     //Defines currency format
     NumberFormat formatter = NumberFormat.getCurrencyInstance(Locale.US);
     // Define the variables
     char ans = 'Y';
     double apr;
     double monthly_Interest;
     double monthlyInterestPaid;
     double monthly_Payments;
     double monthly_principle;
     double principle;
     // Standard Integers
     int months; // Set months for later calculations
     int term = 30; // Number of Years
     int yearCnt = 1; // Counter for Years to increment in 12 Months (While Loop)
     int yearpluscnt; // Counter for Years (For Loop)
     int mthPaymentNum = 1; // Counter used later
     int max_Months; // Maximum Months
     //hard coded values
     principle = 200000; // Principle Value of the Mortgage
     apr = .0575; // Annual Percentage Rate
     // Calculate Values
     monthly_Interest = (apr / 12); // Monthly interest rate
     months = (term * 12); // Total number of months in the term
     max_Months = months;
     monthlyInterestPaid =(principle * monthly_Interest); //Monthly interst paid
     //calculation for monthly payment
     monthly_Payments = (principle * monthly_Interest) / (1-Math.pow(1 + monthly_Interest,- months));
     //calculation for monthly principle paid
     monthly_principle = (monthly_Payments - monthlyInterestPaid); //monthly principle
     // print payment summary
     System.out.println("\n\n\t Loan Summary\n");
     System.out.println("\n\n\t The amount of the mortgage is " + formatter.format(principle));
     System.out.println("\t With an annual interest rate of " +apr * 100+"%");
     System.out.println("\t your monthly payment will be " +formatter.format(monthly_Payments)+ " per month");
     System.out.println("\t for a term of "+term+ " years.\n\n");
     System.out.println("\n\t Here is the amortization schedule:");
     //3 second pause before displaying amortization schedule
     try
     Thread.sleep(3000);
     catch (InterruptedException e) {}
          //loop
          while(ans=='Y' || ans=='y'){
          // print headings
          System.out.println("\t-------------------------------------------------------------------");
          System.out.println("\n\tMonth\tInterest Paid \tPrinciple Paid \tPrinciple Balance\n");
          System.out.println("\t-------------------------------------------------------------------");
               // for loop to print each months numbers
               yearpluscnt=mthPaymentNum+12;
               for (mthPaymentNum = yearCnt; mthPaymentNum < yearpluscnt ; mthPaymentNum++ ){
               //The new principle balance after subtracing from the remainder principle balance
               principle = (principle - monthly_principle);
               months = (months - 1);
               //monthly interest paid calculation
               monthlyInterestPaid = (principle * monthly_Interest);
               //monthly payment on the principle calculation
               monthly_principle = (monthly_Payments - monthlyInterestPaid);
                    //Pause between monthly display
                    try
                    Thread.sleep(50);
               catch (InterruptedException e) {}
               // Print monthly payment information
               System.out.println("\t" + mthPaymentNum + "\t" +
               formatter.format(monthlyInterestPaid) + "\t\t" + formatter.format(monthly_principle) +
               "\t\t\t" + formatter.format(principle));
          System.out.print("\n\n\tWould you like to Continue? Y or N:");
          ans=(char)System.in.read();
          System.in.read();
          System.in.read();
          yearCnt = yearCnt+12;
          System.out.println("\n");
}