There's a website which is there just to answer exactly that question : 
http://floating-point-gui.de/

On Thursday, September 3, 2015 at 9:45:18 AM UTC+2, Michael Borregaard 
wrote:
>
> Hi,
> in the Julia documentation, I fell over this strange behaviour:
>
> julia> 1.1 + 0.1
> 1.2000000000000002
>
> I understand that this may make sense in the context of how floating 
> numbers are implemented inside Julia - but I cannot think of a single 
> situation in which the user would want this behaviour.
> Can someone explain what is going on, and why this is not a bug?
>
> Thanks,
> Michael
>

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