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Message: [QUOTE="sln, post: 4867070"] The ballpark for comparisons are C functions ceil/floor (posix in perl). Never can you compare doubles for equality, and never can you even see a print of thier actual float value. There is only one need for true comparisons, the is the case of Numerical Methods absolute "difference" being less/greater than some value. Or in the case of rounding is needed (ala the Pentium 60 bug where zero is less than some absolute value of some really small fraction of 1). -sln [/QUOTE]