[Haskell-cafe] Re: 0/0 > 1 == False

David Roundy wrote:

On Thu, Jan 10, 2008 at 09:24:34PM +0100, Achim Schneider wrote:

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John Meacham wrote:

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On Thu, Jan 10, 2008 at 11:17:18AM +0200, Yitzchak Gale wrote:

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The special case of 1/0 is less clear, though. One might decide that it should be an error rather than NaN, as some languages have.

It is neither,

1/0 = Infinity -1/0 = -Infinity

Just out of curiosity:

1/-0 = -Infinity? -1/-0 = Infinity?

Yes. (You could have tried this for yourself, you know... but I suppose haskell-cafe isn't a bad interactive Haskell interpreter, perhaps more user friendly than ghci.)

Prelude> 1 `div` 0 *** Exception: divide by zero That's it. One just shouldn't just extrapolate and think you didn't mean GHC but IEEE... -- (c) this sig last receiving data processing entity. Inspect headers for past copyright information. All rights reserved. Unauthorised copying, hiring, renting, public performance and/or broadcasting of this signature prohibited.