Date:         Fri, 8 Mar 2002 10:30:58 -0500
Reply-To:     Roger Lustig <rlustig@CBDCREDIT.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Roger Lustig <rlustig@CBDCREDIT.COM>
Organization: Creative Business Decisions, Inc.
Subject:      Re: Length statement and numeric precision
Content-Type: text/plain; charset=us-ascii; format=flowed

Kevin:
Try 9,999 and 10,001.  *Some* integers will allow exact representation,
and others will not.  I think the manual's point is that you can't count
on an integer being represented exactly above that level.

Roger

Kevin Roland Viel wrote:

> Greetings again,
>
>   In three bytes, the largest integer that can exactly be represented on
> IEEE system should be 8,191 (TS-654 states 8,192).  The LENGTH statement
> is supposed to "Specifies the number of bytes for storing variables".
> Why am I able to see 10,000?
>
> 151  %put Version=&sysver  OS=&SYSSCPL;
> Version=8.2  OS=WIN_NT
> 152  data _null_;
> 153  length x 3;
> 154  /* binary 01 1111 1111 1111 */
> 155  x=8191;
> 156  put x=;
> 157  /* binary 10 0000 0000 0000 */
> 158  x=8192;
> 159  put x=;
> 160  /* binary 10 0111 0001 0000 */
> 161  x=10000;
> 162  put x=;
> 163  run;
>
> x=8191
> x=8192
> x=10000
> NOTE: DATA statement used:
>       real time           0.01 seconds
>       cpu time            0.01 seconds
>
>
> Regards,
>
>
> Kevin
>
> Kevin Viel
> Department of Epidemiology
> Rollins School of Public Health
> Emory University
> Atlanta, Ga 30322
>