Programming Forums > Application Development > Java

rockybalboa · Mar 20th, 2005, 4:27 PM

Hello,
Can anyone advise me on why I can't get the following code to loop? I'm trying to get continuous calculation until the variable amount = 0.
I will work out display params after I get the loop to work. I'm new to Java, but not coding. This is a simple program so there's probably a simple answer.
My thanks to anyone willing to teach me.
Thanks
DW

(Toggle Plain Text)

import java.text.*;

class Wk3
{
    public static void main (String[] arguments)    //create main
    {
        int term = 30;                              //init var for length of loan
        double amount = 200000;                        //init var for loan amt
        double pmt = 0;                             //init var for payment
        double rate = .0575;                        //init var for interest rate
        double rateMo = 0;                          //init var for monthly interest paid        
        {
            rate = (rate/12);                       //divide annual rate to get monthly rate
            term = (term * 12);                     //multiply years to get length in months            
            pmt= (amount * (rate)) / (1-Math.pow(1 + rate, - term));    //compute payment
            {
                if (amount > 0)                         //run if counter >0
                {
                    java.text.DecimalFormat dec = new java.text.DecimalFormat(",###.00");               //format next output to dollars.cents
                    System.out.println("\nThis months payment is $" + dec.format (pmt));                //display payment
                    System.out.println ("\nYour loan balance is $" + dec.format (amount));              //display loan amt
                    System.out.println("\nThis months interest is $" + dec.format (amount * (rate )));  //montly interest payment
                }
                amount -=  pmt;
            }
        }
    }
}

ZenMasterJG · Mar 20th, 2005, 4:43 PM

its not looping becuase your not using any of the looping structrues in java. there needs to be a while or for or somthing in there to make it loop

Pimp Daddy · Mar 20th, 2005, 5:06 PM

Quote:

Originally Posted by ZenMasterJG

its not looping becuase your not using any of the looping structrues in java. there needs to be a while or for or somthing in there to make it loop

That's correct - I would recommend using a for loop for this problem.

You Like Java? · Mar 20th, 2005, 6:19 PM

Is this what you wanted?

(Toggle Plain Text)

import java.text.*;
 
class Wk3
{
	 public static void main (String[] arguments) //create main
	 {
		 int term = 30; //init var for length of loan
		 double amount = 200000; //init var for loan amt
		 double pmt = 0; //init var for payment
		 double rate = .0575; //init var for interest rate
		 double rateMo = 0; //init var for monthly interest paid 
		 while (amount > 0)
		 {
			 rate = (rate/12); //divide annual rate to get monthly rate
			 term = (term * 12); //multiply years to get length in months 
			 pmt= (amount * (rate)) / (1-Math.pow(1 + rate, - term)); //compute payment
			 java.text.DecimalFormat dec = new java.text.DecimalFormat(",###.00"); //format next output to dollars.cents
			 System.out.println("\nThis months payment is $" + dec.format (pmt)); //display payment
			 System.out.println ("\nYour loan balance is $" + dec.format (amount)); //display loan amt
			 System.out.println("\nThis months interest is $" + dec.format (amount * (rate ))); //montly interest payment
			 amount -= pmt;
		 }
	 }
}

(Damn vB formatting...)

Mar 20th, 2005, 4:27 PM	#1
rockybalboa Newbie Join Date: Mar 2005 Posts: 1 Rep Power: 0	Can't get loop to work Hello, Can anyone advise me on why I can't get the following code to loop? I'm trying to get continuous calculation until the variable amount = 0. I will work out display params after I get the loop to work. I'm new to Java, but not coding. This is a simple program so there's probably a simple answer. My thanks to anyone willing to teach me. Thanks DW (Toggle Plain Text) import java.text.; class Wk3 { public static void main (String[] arguments) //create main { int term = 30; //init var for length of loan double amount = 200000; //init var for loan amt double pmt = 0; //init var for payment double rate = .0575; //init var for interest rate double rateMo = 0; //init var for monthly interest paid { rate = (rate/12); //divide annual rate to get monthly rate term = (term 12); //multiply years to get length in months pmt= (amount * (rate)) / (1-Math.pow(1 + rate, - term)); //compute payment { if (amount > 0) //run if counter >0 { java.text.DecimalFormat dec = new java.text.DecimalFormat(",###.00"); //format next output to dollars.cents System.out.println("\nThis months payment is $" + dec.format (pmt)); //display payment System.out.println ("\nYour loan balance is $" + dec.format (amount)); //display loan amt System.out.println("\nThis months interest is $" + dec.format (amount * (rate ))); //montly interest payment } amount -= pmt; } } } } import java.text.; class Wk3 { public static void main (String[] arguments) //create main { int term = 30; //init var for length of loan double amount = 200000; //init var for loan amt double pmt = 0; //init var for payment double rate = .0575; //init var for interest rate double rateMo = 0; //init var for monthly interest paid { rate = (rate/12); //divide annual rate to get monthly rate term = (term 12); //multiply years to get length in months pmt= (amount * (rate)) / (1-Math.pow(1 + rate, - term)); //compute payment { if (amount > 0) //run if counter >0 { java.text.DecimalFormat dec = new java.text.DecimalFormat(",###.00"); //format next output to dollars.cents System.out.println("\nThis months payment is $" + dec.format (pmt)); //display payment System.out.println ("\nYour loan balance is $" + dec.format (amount)); //display loan amt System.out.println("\nThis months interest is $" + dec.format (amount * (rate ))); //montly interest payment } amount -= pmt; } } } }

Mar 20th, 2005, 6:19 PM	#4
You Like Java? Newbie Join Date: Mar 2005 Location: aboho.com (sn:eyvind) Posts: 20 Rep Power: 0	Is this what you wanted? (Toggle Plain Text) import java.text.; class Wk3 { public static void main (String[] arguments) //create main { int term = 30; //init var for length of loan double amount = 200000; //init var for loan amt double pmt = 0; //init var for payment double rate = .0575; //init var for interest rate double rateMo = 0; //init var for monthly interest paid while (amount > 0) { rate = (rate/12); //divide annual rate to get monthly rate term = (term 12); //multiply years to get length in months pmt= (amount * (rate)) / (1-Math.pow(1 + rate, - term)); //compute payment java.text.DecimalFormat dec = new java.text.DecimalFormat(",###.00"); //format next output to dollars.cents System.out.println("\nThis months payment is $" + dec.format (pmt)); //display payment System.out.println ("\nYour loan balance is $" + dec.format (amount)); //display loan amt System.out.println("\nThis months interest is $" + dec.format (amount * (rate ))); //montly interest payment amount -= pmt; } } } import java.text.; class Wk3 { public static void main (String[] arguments) //create main { int term = 30; //init var for length of loan double amount = 200000; //init var for loan amt double pmt = 0; //init var for payment double rate = .0575; //init var for interest rate double rateMo = 0; //init var for monthly interest paid while (amount > 0) { rate = (rate/12); //divide annual rate to get monthly rate term = (term 12); //multiply years to get length in months pmt= (amount * (rate)) / (1-Math.pow(1 + rate, - term)); //compute payment java.text.DecimalFormat dec = new java.text.DecimalFormat(",###.00"); //format next output to dollars.cents System.out.println("\nThis months payment is $" + dec.format (pmt)); //display payment System.out.println ("\nYour loan balance is $" + dec.format (amount)); //display loan amt System.out.println("\nThis months interest is $" + dec.format (amount * (rate ))); //montly interest payment amount -= pmt; } } } (Damn vB formatting...) __________________ If you need help with Java, you can go to javaforum.tk and get answers quickly. Programmer YouLikeJava = new JavaProgrammer("Eyvind"); YouLikeJava.printInfo(); YouLikeJava.setWeb("You Like Java?"); Last edited by You Like Java?; Mar 20th, 2005 at 6:22 PM.

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Mar 20th, 2005, 4:43 PM	#2
ZenMasterJG Hobbyist Programmer Join Date: Nov 2004 Location: Boston, MA Posts: 148 Rep Power: 4	its not looping becuase your not using any of the looping structrues in java. there needs to be a while or for or somthing in there to make it loop

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Programming Forums > Application Development > Java

Can't get loop to work