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Re: easy question [message #45749 is a reply to message #16325]

Fri, 07 October 2005 12:58

Richard French
Messages: 173
Registered: December 2000

Senior Member

You can also dispense with the begin and endif/endelse entries as follows:

pro mydemo,arg

if arg eq 1 then print,"one" $
else if arg eq 2 then print,"two" $
else print, "many
end

mydemo,1
mydemo,2
mydemo,3
End

On 10/6/05 10:48 PM, in article di4nlo$2550$1@agate.berkeley.edu, "Marshall
Perrin" <mperrin+news@cymric.berkeley.edu> wrote:

>
> Both Michael and Haje are correct that one can use a case statement
> for this sort of thing. But IDL handles a series of if statements just
> fine, too:
>
> pro demo, arg
>
> if arg eq 1 then begin
> print,"one"
> endif else if arg eq 2 then begin
> print,"two"
> endif else begin
> print, "many"
> endelse
>
> end
>
> This requires typing a lot more characters than the case version,
> but I think it can sometimes make the program logic a bit clearer.
> Either way works, so feel free to use whichever idiom you feel more
> comfortable with.
>
> - Marshall
>
>

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[Message index]

		Easy question? By: colinr on Wed, 14 July 1999 00:00
		Re: easy question By: Richard French on Fri, 07 October 2005 12:58
		Re: easy question By: mperrin+news on Thu, 06 October 2005 19:48
		Re: easy question By: ChiChiRuiz@gmail.com on Thu, 06 October 2005 14:55
		Re: easy question By: Haje Korth on Thu, 06 October 2005 11:21
		Re: easy question By: Michael Wallace on Thu, 06 October 2005 11:27

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