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Re: HELP with IF statement [message #91277 is a reply to message #91271]

Thu, 25 June 2015 08:20

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

On 06/25/15 08:22, David Fanning wrote:
> g.nacarts@gmail.com writes:
>
>> I have a problem with IF statement
>>
>> I wanted to check whether my array A has any zero element and if
>> so then simply return a zero array (with two zeroes). I typed the
>> following but am not sure if it's correct.
>>
>> A FLOAT = Array[58]
>>
>> FOR i=0L, 57 DO BEGIN
>> IF A[i] EQ 0 THEN RETURN, [0,0]
>> ENDFOR
>
> There are a whole host of articles on my web page explaining why it will
> be impossible to find a zero value in an array of floats. I'll just give
> you the bottom line: use Floats_Equal from the Coyote Library to do this
> kind of comparison:
>
> IF Floats_Equal(a[i],0) THEN RETURN, [0,0]

Yes. My first reply when I am asked this sort of question is: "What do
you think is zero?"

Or, if I'm feeling particularly obtuse: "What IS zero?" (with a suitable
gesticulatory flourish, of course :o)

Funny, now that I think about it, people haven't come to ask me
questions for a while now. Huh.

cheers,

paulv

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[Message index]

		HELP with IF statement By: g.nacarts on Thu, 25 June 2015 04:10
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 05:22
		Re: HELP with IF statement By: g.nacarts on Thu, 25 June 2015 05:48
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 05:51
		Re: HELP with IF statement By: g.nacarts on Thu, 25 June 2015 05:56
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 05:59
		Re: HELP with IF statement By: Paul Van Delst[1] on Thu, 25 June 2015 08:20
		Re: HELP with IF statement By: g.nacarts on Thu, 25 June 2015 08:34
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:42
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:46
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:53
		Re: HELP with IF statement By: David Fanning on Thu, 25 June 2015 08:34
		Re: HELP with IF statement By: Paul Van Delst[1] on Thu, 25 June 2015 09:41

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