Date:         Fri, 18 Sep 2009 09:58:25 -0700
Reply-To:     mlhoward@avalon.net
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Mary <mlhoward@AVALON.NET>
Subject:      Re: Interesting Construct
Content-Type: text/plain; charset="UTF-8"

The PL/1 is ^=; I personally like to use the PL/1 construct
whenever possible.  I don't think the tilda was used in PL/1,
and I haven't ever seen it used in production PL/1 code- I
used to work in a PL/1 shop, and they used ^= (which
come out looking like an L on its side on the mainframe).

-Mary

--- snoopy369@GMAIL.COM wrote:

From: Joe Matise <snoopy369@GMAIL.COM>
To: SAS-L@LISTSERV.UGA.EDU
Subject:      Re: Interesting Construct
Date:         Tue, 15 Sep 2009 16:59:10 -0500

~ is another option for 'NOT' in SAS.  I think it dates back to PL/2 but I'm
not sure, as I don't date back that far myself.

-Joe

On Tue, Sep 15, 2009 at 4:56 PM, Jules Bosch <jbosch1@optonline.net> wrote:

> Has anyone ever seen the following SAS construct?
>
>
>
> if missing(studyday) and ~missing(trtdate) and ~missing(enddate) then do;
>
>
>
> In particular, I am interested in the use of the tilde.  Can anyone
> elaborate?
>
>
>
> Jules
> http://www.boschsystems.com/
>