Date:         Thu, 23 Nov 2006 11:05:03 -0800
Reply-To:     RolandRB <rolandberry@HOTMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         RolandRB <rolandberry@HOTMAIL.COM>
Organization: http://groups.google.com
Subject:      Re: A question about how to let user defined macro returns
Comments: To: sas-l@uga.edu
In-Reply-To:  <200611231610.kANBsYPx002299@mailgw.cc.uga.edu>
Content-Type: text/plain; charset="us-ascii"

Gerhard Hellriegel wrote:
> example:
>
> %macro double(x);
>   %let res=%eval(&x*2);
>   &res;

I think that last semicolon should not be there.

> %mend;
>
> %let test=%double(8);
>
>
> But be careful with the usage:
>
> data a;
>   set sashelp.class;
>   *double_age=%double(age); /* this will not work */
>   quad_age=age*%double(2);
>   put quad_age;
> run;
>
> Regards,
> Gerhard
>
>
> On Thu, 23 Nov 2006 09:47:17 -0500, Minze Su <slhappyls@GMAIL.COM> wrote:
>
> >Dear all:
> >
> >  I think in SAS a macro can work as a functions, but how can it give back
> >value as other programming languages do.
> >
> >BR,
> >
> >Minze