FLASH: math errors in action script >

[Matt Wobensmith]

Hi Aaron -


You wrote:

>Sometimes the end 

>product (/:ans) has a strange value, such as -78.1210000000001, when 

>subtracting simple numbers such as 790.72 from 868.841.



This is what's known as "round-off error". It's not a bug, but a side effect

of how computers do math. 


It's documented here:


Flash returns erroneous results for certain mathmatical calculations

http://www.macromedia.com/support/flash/ts/documents/roundoff_error.htm



Matt



---------------

Matt Wobensmith

Macromedia

Flash Community Manager


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