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Re: % Loop limit expression too large for loop variable type. [message #24882 is a reply to message #24880]

Mon, 30 April 2001 09:58

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"hua Guo" <gh75@usa.net> writes:

> Dear all,
> I got this error message when I tried to run a program:
>
> % Loop limit expression too large for loop variable type.
> <LONG ( 54695)>.
>
> What is wrong here? I am a beginner here. Thanks for any help.

The default type for integers in IDL is a "short" or 16-bit integer,
which can only go from -32768 to 32767. The quick fix is to put an
"L" at the end of your numeric constants to promote them to "long"
32-bit integers.

for i = 0L, NMAX-1 do begin ...

Note the "0L" instead of "0".

Craig

P.S. This is one of the secret banes of IDL programming. You have
the freedom to use any IDL type at any time. The problem is that any
IDL type can appear at any time...

--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: % Loop limit expression too large for loop variable type. By: Paul van Delst on Mon, 30 April 2001 10:41
		Re: % Loop limit expression too large for loop variable type. By: Craig Markwardt on Mon, 30 April 2001 09:58
		Re: % Loop limit expression too large for loop variable type. By: davidf on Mon, 30 April 2001 10:00

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