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float sum calculate problem: msg#00009

Subject: float sum calculate problem
Hi, *.

In my task I have 4 elements.
In the form I need to sum 3 float values and put the result in the 4-th. 
The broblem is when I specify float values in some cases I get summed value 
with 12-digit tail.
example: 1st value = "10.1", 2nd = "200.1", 3d = "1.1"
and instead of sum = "211.3" calculate produces  "211.2999999999999998".
Calculated value is used to in the 5th field in constraint for
equality to value 211.3 --> that is evaluated to false.


Is it the problem of chiba core or jxpath library.
How can I fix it, or at least round the value to 2 digits after point. Please 
help!

-- 
Michael Pavlov
mailto:MIC-B54ZLJp+iVcox3rIn2DAYQ@xxxxxxxxxxxxxxxx




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