Java Deduction gives wrong result

Question

In My Java code I'm trying to do following

    double a=1769.58;
    double b=986.58;
    double c=a-b;
    System.out.println("Result "+c);

This is retuning the result as 782.9999999999999. but it should be 783.00 what is wrong with this.how can I get correct value and what is the reason for this?

Side note that you should denote `double`s as `1769.58D` and `986.58D`. — Unihedron, May 22 '14 at 08:36

score 0 · Answer 1 · edited May 23 '17 at 12:11

0

It's because computer can't stored exactly the good value of floating point. See this response to learn more about this problem.

edited May 23 '17 at 12:11

Community

1
1

answered May 22 '14 at 08:28

JumpIfBelow

53
2
11

score 0 · Answer 2 · answered May 22 '14 at 08:32

0

try this:

double a=1769.58;
double b=986.58;
int c=(int)a-(int)b;

answered May 22 '14 at 08:32

user3637025

11

This is identical to `Double.compare(a, b)` – Unihedron May 22 '14 at 08:39

Java Deduction gives wrong result

2 Answers2