Re: st: re: WHILE command

[Jeph Herrin <junk@spandrel.net>]

Agree that -while- is dispensible, but there are situations
(such as the one described here by Kit) where it makes for
much more readable code. Looking at

 while `grad'>=`eps' {
         ...
 }

one knows right away what the loop is about. So let's not get
rid of it just yet.


Jeph



Kit Baum wrote:
> Nick W said
>
> How does one do this in cases where one cannot calculate, in advance,
> the number of repetitions needed, or the list of items to be acted upon?
>
> As Nick C has pointed out, nothing stops you from using a forvalues loop 
> over a large number of values and testing within the loop to determine 
> whether some condition is now satisfied (e.g., if the norm of the 
> gradient is now less than epsilon), and using
>
> continue, break
>
> to terminate the loop at that point.
>
>
> Kit Baum, Boston College Economics and DIW Berlin
> http://ideas.repec.org/e/pba1.html
> An Introduction to Modern Econometrics Using Stata:
> http://www.stata-press.com/books/imeus.html
>
>
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