weird....

[person]

code:

public class hi {     public static void main (String[] args)     {         System.out.println (0.1 + 0.2);     } }

k, so this seems like it should give me 0.3
but apparently, it outputs 0.30000000000000004
y?

[[Gandalf]]

This topic was talked about in detail here:

http://www.compsci.ca/v2/viewtopic.php?t=9833

This may not be what you are talking about

[person]

and how would i solve this problem and make java add like it should be?

[wtd]

Floating point numbers cannot be natively represented inside a computer. Therefore we have a Pretty Good(tm) way of estimating them to a fair degree of accuracy.

[person]

Quote:

Floating point numbers cannot be natively represented inside a computer. Therefore we have a Pretty Good(tm) way of estimating them to a fair degree of accuracy.

so basically, there's no way to actually do addition with decimals in java?

[wtd]

Not to complete accuracy. The issue is not restricted to Java.

[person]

Quote:

Not to complete accuracy. The issue is not restricted to Java.

k, i know languages like turing has the same problem but y does turing not output 0.30000000000004 for 0.1+0.2? does turing hava another way of calculating hte numbers?

[wtd]

person wrote:

Quote:

Not to complete accuracy. The issue is not restricted to Java.

k, i know languages like turing has the same problem but y does turing not output 0.30000000000004 for 0.1+0.2? does turing hava another way of calculating hte numbers?

It's just a matter of how it outputs the number. It like rounds to a certain place by default. Many environments will round to something like 8-10 places.

Then, rather than output:

code:

0.3000000000

It simply outputs:

code:

0.3