Thread: Java : For Loop gets an unexpected 700.000001 result.

Hello guys,


Can anyone find something in this code strange. It pops out an unexpected 700.0000001 meanwhile all others put 500.00, 400.00,300.00

Result:

The interest at 1 is 100.0
The interest at 2 is 200.0
The interest at 3 is 300.0
The interest at 4 is 400.0
The interest at 5 is 500.0
The interest at 6 is 600.0
The interest at 7 is 700.0000000000001
The interest at 8 is 800.0
The interest at 9 is 900.0
The interest at 10 is 1000.0




The code is:
double amount = 10000;
for(int interestRate = 1; interestRate < 11; interestRate++){
double result = calculateInterest(10000, interestRate);
System.out.println("The interest at " + interestRate + " is " + result );
}


It uses this method:
public static double calculateInterest(double amount, double interestRate) {
return(amount * (interestRate / 100));
}


Any thought ?

--- Update ---

Solution is

String.format("%.2f", )

System.out.println("The interest at " + interestRate + " is " + String.format("%.2f", result ));