Format the output

[Moustafa taha]

This code compares loan with various interest rates

 public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        //Prompt the user to enter the loan amount
        System.out.print("Enter the loan amount:");
        int loanAmount=input.nextInt();
        //Promp the user to enter the period in number of years
        System.out.print("Enter number of years:");
        int numberOfYears=input.nextInt();
        System.out.println("Interest Rate   Monthly Payment   Total Payment");
        int months=numberOfYears*12;
        double interestRate=5;
        double monthlyPayment;
        double rate;
        double totalPayments;
        while(interestRate<=8)
        {
            rate=interestRate/1200;
            //Calculating monthly payment
             monthlyPayment=(rate+(rate/((Math.pow((1+rate),months))-1)))*loanAmount;
            //Calculating total payments
             totalPayments=monthlyPayment*months;
            System.out.printf("%-13f   %-15.2f   %-13.2f\n",interestRate,monthlyPayment,totalPayments);
            interestRate+=(double)1/8;
        }
    }

The problem in a small thing in the format of the output
the first column of the output is as follows
5.000000
5.125000
5.250000
5.375000
5.500000
5.625000
5.750000
5.875000
6.000000
6.125000
6.250000
6.375000
6.500000
6.625000
6.750000
7.000000
7.125000
7.250000
7.375000
7.625000
7.750000
7.875000
8.000000
i want to remove zeros and make the format like this
5%
5.125%
5.25%
....
....
8.0%
thanks

[Zack]

Firstly, can we see what you've tried? Have you tried DecimalFormat or other printf methods?

Also, do you want 5% or 5.0%? You use both ambiguously in your example.

[Moustafa taha]

I've tried printf method as following
System.out.printf("%-13f %-15.2f %-13.2f\n",interestRate,monthlyPayment,totalPayments );
and i want the format to be like 5%

[Zack]

Have a look at: DecimalFormat (Java 2 Platform SE v1.4.2)

Then you will have something like this:

System.out.printf("%-13s   %-15.2f   %-13.2f\n",new DecimalFormat(YourDecimalFormatWillGoHere).format(interestRate),monthlyPayment,totalPayments);

With the API documentation you should be able to figure out what "YourDecimalFormatWillGoHere" will be.

[Moustafa taha]

Thanks very much for your help .
after I've read the API documentation i understood little things and tried to improve this line as follow

System.out.printf("%-13s   %-15.2f   %-13.2f\n",new DecimalFormat("0.###%").format(interestRate),monthlyPayment,totalPayments);

but as you know the % sign multiply the number by 100 and show as percentage
and this is the new problem.......after this formatting the column is as follows
500%
512.5%
525%
537.5%
550%
562.5%
575%
587.5%
600%
612.5%
625%
637.5%
650%
662.5%
675%
687.5%
700%
712.5%
725%
737.5%
750%
762.5%
775%
787.5%
800%
so I've to multiply the output by 100 to get true result
How can i do this Particularly i deal with a string?
I hope replying me.
thanks

[Zack]

'
Prefix or suffix
No
Used to quote special characters in a prefix or suffix, for example, "'#'#" formats 123 to "#123". To create a single quote itself, use two in a row: "# o''clock".

That's directly from the API, describing how to use literals in your string.