round down to 2 sig. numbers after the decimal point

[soc86]

I would like to round my number down to 2 sig. numbers after the decimal point in my answer, ie:

Old loan: £745.09
Loan plus 3% interest: £767.44
Wages: £19,206.92
Wages minus threshold: £9,206.92
Repayment: £828.62
New loan amount: £-61.18

at the moment my answer is:

Loan plus 3% interest: 767.4417386951634
wages: 19206.920769257813
Wages minus threshold:9206.920769257813
Amount Re-paid: 828.6228692332031
New loan amount: -61.181130538039724




public class loanPayments {

// place constant declarations (static final) below.
// e.g. 3% interest, 9% repayment, 5% pay rise and 10k theshold



public static void main (String[]arg){
//declare variables
double loan;
double wages;
final int THRESHOLD= 10000;
double netInc=0;
double newBal=0;
double totalLoan;
double deduction;
double firstBal;
int year=1;


//print qoute
System.out.println("Enter total amount of student loan taken");
loan=UserInput.readDouble();
//print qoute
System.out.println("Enter anticipated income");
wages=UserInput.readDouble();

firstBal = newBal-0;

while (newBal >= 0) {

newBal=loan*0.03;

netInc=wages-THRESHOLD;
deduction=netInc*0.09;

totalLoan=loan+newBal;

newBal=totalLoan-deduction;



System.out.println("Year: "+year+" Old loan: £"+loan);
System.out.println("Loan plus 3% interest: £" +totalLoan);
System.out.println("wages: "+wages);
System.out.println("Wages minus threshold: £" +netInc);
System.out.println("Amount Re-paid: £"+ deduction);
System.out.println("New loan amount: £"+newBal);

loan=newBal+0;
wages=wages +(wages*0.05);
year=year+1;
}

year=year-1;

System.out.println("It took you "+year+" years to repay the loan");
System.out.println("The original loan was "+firstBal+" but you had to pay back £4,801.08");






}//end main

}//end class

[manavo11]

Have a look at the DecimalFormat class: http://java.sun.com/j2se/1.4.2/docs/...malFormat.html

[oceanebelle]

Notbad and soc86 are in the race for who gets the answer first Lole

I've added a suggestion to use String.format

Sample usage on Notbad's thread.