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Date: Thu, 19 May 2011 05:52:29 -0700
From: Patricia Shanahan <pats@acm.org>
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Subject: Re: About using assertion
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On 5/18/2011 10:32 PM, Tim McDaniel wrote:
...
> (As a tangent, I'm not sure whether "Foo.sqrt(-0.0)" should throw an
> exception or not.)

For what it is worth, Math.sqrt returns 0 for positive or negative zero
input.

Negative zero is a strange beast. As far as I can tell, it exists mainly
to produce negative infinity when it is used as a divisor. For example,
it is equal to zero for comparison purposes.

Patricia