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Re: Having trouble stopping a loop (or loop de loop de loop) [message #62160 is a reply to message #62159]

Mon, 25 August 2008 21:58

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

David Fanning wrote:
> And, second, I don't think in 25+ years of computer programming I have
> ever used a floating point loop counter. I didn't even know it was
> possible. If it *is* possible, then I envision havoc, simply by
> virtue of the way floats can (or, more to the point, cannot) be
> represented on computers. (I could easily be wrong about this,
> but I'm just saying I've never found a reason for it, so I have
> never tried it. There must be a significant difference in how
> you and I think about loops.)

You can use a floating point counter and it is a problem:

IDL> for i = 0.0, 1.0, 0.1 do j = i
IDL> print, j
0.900000
IDL> print, j, format='(F20.15)'
0.900000095367432

Mike
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www.michaelgalloy.com
Tech-X Corporation
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[Message index]

		Re: Having trouble stopping a loop (or loop de loop de loop) By: Jean H. on Tue, 26 August 2008 09:46
		Re: Having trouble stopping a loop (or loop de loop de loop) By: Michael Galloy on Tue, 26 August 2008 08:18
		Re: Having trouble stopping a loop (or loop de loop de loop) By: Mike[2] on Tue, 26 August 2008 07:20
		Re: Having trouble stopping a loop (or loop de loop de loop) By: Spon on Tue, 26 August 2008 04:57
		Re: Having trouble stopping a loop (or loop de loop de loop) By: Chris[6] on Mon, 25 August 2008 22:09
		Re: Having trouble stopping a loop (or loop de loop de loop) By: Michael Galloy on Mon, 25 August 2008 21:58
		Re: Having trouble stopping a loop (or loop de loop de loop) By: David Fanning on Mon, 25 August 2008 20:40
		Re: Having trouble stopping a loop (or loop de loop de loop) By: mankoff on Mon, 25 August 2008 20:22

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