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Rounding off Java numbers
Posted on 2012-12-27
Hello
Could someone please run my programme below and tell me how I can round off the double values to 2 decimal places
Many thanks
/*4. Write a program to calculate and display the amount of money in a bank
account that was opened with a deposit of €20 fifteen years ago and has
earned interest at 10% (compound interest) per annum. Your program
should display the amount of money in the account at the end of each year
for all of the 15 years.*/
Could someone please run my programme below and tell me how I can round off the double values to 2 decimal places
Many thanks
/*4. Write a program to calculate and display the amount of money in a bank
account that was opened with a deposit of €20 fifteen years ago and has
earned interest at 10% (compound interest) per annum. Your program
should display the amount of money in the account at the end of each year
for all of the 15 years.*/
public class Q4
{
public static void main (String [] args)
{
double start = 20;
double years = 15;
double interest = 10;
double totalInt;
for (int counter = 1; counter <=15; counter ++)
{
totalInt = (start / 100) * interest;
start = start + totalInt;
System.out.println("Year " + counter + " Total €" + start);
}
}
}
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2 Comments
Active today
Have a look at the DecimalFormat class.
Thanks I have never used the Java Api before as I am a novice.
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Q4
{
public static void main (String [] args)
{
double start = 20;
double years = 15;
double interest = 10;
double totalInt;
NumberFormat formatter = new DecimalFormat("0.00");
for (int counter = 1; counter <=15; counter ++)
{
totalInt = (start / 100) * interest;
start = start + totalInt;
System.out.println("Year " + counter + " Total €" + formatter.format(start));
}
}
}
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