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Precision of double

Hi, all. Can't find this anywhere, so...

On a G3/G4, what is the range of values for double? I'm pretty sure I recall an int being 32-bit, so would a double be 64-bit? Or is a float 64-bit, making a double 128-bit?

I'm trying to figure out just exactly how many digits I should specify for pi so it won't round off on the end and so I can have it as precise as possible.

-- Rob

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