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Re: simple question [message #20160 is a reply to message #16986]

Thu, 18 May 2000 00:00

Paul van Delst
Messages: 364
Registered: March 1997

Senior Member

Craig Markwardt wrote:
>
> "richard hilton" <rdh5@dmu.ac.uk> writes:
>
>> This probably sounds like a stupid question but does anybody know of an IDL
>> equivilent to the CONTINUE command in C/C++ ? Your help would be much
>> appreciated.
>
> I've wished for an equivalent to continue and break, but have never
> found it. You will have to do use GOTO explicitly.
>
> for i = 0, n-1 do begin
> if val(i) EQ 0 then goto, NEXT_VAL ;; equivalent to continue
> compute_val, val(i)
> if val(i) LT 0 then goto, DONE_VAL ;; equivalent to break
> NEXT_VAL:
> endfor
> DONE_VAL:

If there's one thing I loathe, it's GOTO'ing _out_ of DO/IF
loops/constructs. I, too, wish IDL would introduce statements such as
the CYCLE (equiv to CONTINUE) and EXIT (equiv to BREAK) statements in
F90/F95. Sure makes logic in DO loops and IF constructs supa-easy to
follow (although I have to admit the example above is clear and easy to
follow).

How would one begin the process of doing this, i.e. getting RSI to
introduce new control transfer statements such as CYCLE and BREAK? I
can't see that it would be a terribly difficult thing to do but I don't
write compiler type stuff.

paulv
--
Paul van Delst Ph: (301) 763-8000 x7274
CIMSS @ NOAA/NCEP Fax: (301) 763-8545
Rm.202, 5200 Auth Rd. Email: pvandelst@ncep.noaa.gov
Camp Springs MD 20746

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[Message index]

		simple question about bytes By: Gerhard D. Rappold on Thu, 02 September 1999 00:00
		Re: simple question about bytes By: R.Bauer on Fri, 03 September 1999 00:00
		Re: simple question By: Paul van Delst on Fri, 19 May 2000 00:00
		Re: simple question By: promashkin on Thu, 18 May 2000 00:00
		Re: simple question By: Paul van Delst on Thu, 18 May 2000 00:00
		Re: simple question By: Craig Markwardt on Thu, 18 May 2000 00:00

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