Thread: HELPP!!!! - Java validation with nested loops

The program runs good but the nested do-while loop is not working. If you see the condition of the while you can see that it have to be a validation and if it is not in the range of those numbers it has to ask the questions again. You can see that the principal do- while has to validate that principal is not equal to 0 if it is it goes out from the program

I declare:

import java.util.Scanner;
import java.text.DecimalFormat;
public class ACMEMORTGAGE
{
public static void main (String args [])

{
//Declare variables

int mortgageTerm, principal;

Scanner key=new Scanner(System.in);

DecimalFormat decimalPlaces=new DecimalFormat("$0.00");
do
{
System.out.print("Enter principal amount (0 to end program):");
principal=key.nextInt();

do

{
System.out.print("Enter mortgage amortization (1, 2, 3, 5, 10.):");
mortgageTerm=key.nextInt();

} while (mortgageTerm==1 || mortgageTerm==2 || mortgageTerm==3 || mortgageTerm==5 || mortgageTerm==10);



}while (principal!=0);

}

}

Hey hi,
there should be a condition which checks for the principal value before the inner do while loop.
so if user enters the 0 value for principle , it will not execute the inner do while loop and it will exit the program due to outer do while loop condition (principal !=0)

currently what is happening is , if user enters 0 for principal then it still executes the inner do while loop since there is no check of principal value, then it comes out of the program since the outer do while condition is not satisfied.

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