iirc, FFFFFFFFFFFFFFFF is NaN on Windows boxes (at least with Intel Visual Fortran and C), but I can't swear that's guaranteed to be true on all x86 machines, let alone all machines using IEEE arithmetic. I know that some platforms, e.g., IBM mainframes, don't have floating point models capable of representing NaN or Inf, so a completely portable solution is impossible.

Information about American English usage here and here. Floating point issues? Please read this before posting. — emc

In reply to Re: How to create nan/inf by swampyankee
in thread How to create nan/inf by syphilis

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