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Re: while loop crashes [message #71151 is a reply to message #71150]

Tue, 01 June 2010 03:18

Spon
Messages: 178
Registered: September 2007

Senior Member

On Jun 1, 8:51 am, hovru <h.rube...@gmail.com> wrote:
> Wouldn't you not need the "Pro" and "End" if it's not a program, just
> a script (such as when you use "Journal")?
> Also, leaving out the "return" should be fine, since there is only one
> level, right?
>
> Thanks.

Looks like you can't have loops or statements in batch files; every
statement has to be complete, just like if you were using the command
line.

So, this works fine, but your program does not:
---
print, 'start while loop'
j=2
while (j NE 10) do j=j+1

print, 'done', j
---

Have a look at the helpfile for 'Executing Batch Jobs in IDL', I
guess.
I've always wondered why people even use batch mode, when procedures
and functions are almost as easy to write. What is the advantage of
batch mode?

No, you don't need the 'return', but what harm is it doing? Plus, if
you decide to modify the code to pass variables or keywords to it
later, you might wonder why they never come back. :-)

Chris

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[Message index]

		Re: while loop crashes By: Juggernaut on Wed, 02 June 2010 05:54
		Re: while loop crashes By: hovru on Wed, 02 June 2010 01:48
		Re: while loop crashes By: lila hadji on Tue, 01 June 2010 23:03
		Re: while loop crashes By: Michael Galloy on Tue, 01 June 2010 13:08
		Re: while loop crashes By: Michael Galloy on Tue, 01 June 2010 12:49
		Re: while loop crashes By: Michael Galloy on Tue, 01 June 2010 12:43
		Re: while loop crashes By: Juggernaut on Tue, 01 June 2010 06:47
		Re: while loop crashes By: lila hadji on Tue, 01 June 2010 03:27
		Re: while loop crashes By: Spon on Tue, 01 June 2010 03:18
		Re: while loop crashes By: hovru on Tue, 01 June 2010 00:51
		Re: while loop crashes By: Spon on Tue, 01 June 2010 00:38

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