[OGRUG] extra .

[Paul Gilbert]

I don't think it does anything.  For readability you might write 6.0 but 
that will not affect the computation.  There are some situations where  
6 is treated as an integer numeric and 6.0 as a double precision 
numeric,  which can be important when you call C or fortran code.    
Underneath I think 6^2 may call different code than 6.0^2 (integer vs 
real arithmetic) but I don't think that applies to sqrt().  In any case, 
you no longer have an integer after the * and  /.

Paul

Fischer _ Chen Ji Zheng wrote:
> sigma0 <- sqrt((6. * var(maxima))/pi) 
>
> What does the '.' do here?
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