Thorsten Froehlich wrote:

> exceptions, but that is not the point).  The example you provide is simply
> extremely bad programming style and it is neither a bug nor a limitation
> on part of POV-Ray that the above does not work.

If it is that bad programming style, how to do it the good way?? More 
specific:

Return the first non-zero position of an array of length n - or if it is 
all zero return n.

Can you do it without extra variable?

One solution working in pov is:

#declare goon=1;
#declare i=0;
#while ((i<n)&(goon=1))
        #if (a[i]=0)
                #declare i=i+1;
        #else
                #declare goon=0;
        #end
#end

So this can impossible be better style. Please enlighten me with your 
solution.

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