Solved

double numbers

Posted on 2004-10-05
3
223 Views
Last Modified: 2008-03-06
Hi dear experts;

I have two double numbers like following
double A= 0.6;
double B=0.5;

when i try to subtract B from A like following
system.Out.print(A-B);
it gives me  0.0999999998  but i want the result to be  0.10 or 0.1
how can i do this ?  i try ceil floor and round methods of Math class but they didint work
it is an error of java ?
because  when i try to 0.8-06= 0.200000000000004  i want to see result like 0.2
Sincerely,



0
Comment
Question by:elmakarge
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 18

Accepted Solution

by:
armoghan earned 250 total points
ID: 12225282
see this for rounding the double
http://www.rgagnon.com/javadetails/java-0016.html
0
 
LVL 18

Expert Comment

by:armoghan
ID: 12225310
public static final double roundDouble(double d, int places)
{        
return Math.round(d * Math.pow(10, (double) places)) / Math.pow(10,            (double) places);    
}
0
 
LVL 11

Expert Comment

by:cjjclifford
ID: 12225325
This is because of the nature of floating point numbers, and arithmetic... the .999999998 result is not an error....
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
ejb stateless example 2 67
jsp login check 12 65
wild fly 8 startup error 2 79
junit example issue 2 56
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question