[R] -1.1 - 0.1 + 1.2 is NOT null! Why?

[ollestrat]

Thank you for the explanation. Good to know about the issue how double values
are "constructed" by a bit system. This makes me handling double values with
care in using it in R or aother languages control structures etc. 

Thank you also for the hint concerning the Null vs. Zero vs.. issue. Yes,
the subject title is misleading.. 


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