Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!ncar!tank!uxc!uxc.cso.uiuc.edu!uxg.cso.uiuc.edu!uxe.cso.uiuc.edu!daniel
From: daniel@uxe.cso.uiuc.edu
Newsgroups: comp.lang.fortran
Subject: Re: CDC FORTRAN trivia questions
Message-ID: <50500087@uxe.cso.uiuc.edu>
Date: 31 Oct 88 17:12:00 GMT
References: <1196@helios.ee.lbl.gov>
Lines: 22
Nf-ID: #R:helios.ee.lbl.gov:1196:uxe.cso.uiuc.edu:50500087:000:719
Nf-From: uxe.cso.uiuc.edu!daniel    Oct 31 11:12:00 1988


Re: IF(IRON)4,9

This is not a logical IF statement.  It is a variant on the
arithmetic IF.  It's meaning is as follows: Jump to the first
label if the value of the expression is non-zero and to the
second label if it is zero.

(Actually, it can be used as a two branch logical IF also:
Branch to the first label if the logical expression is true;
branch to the second label if it is false.)

These commands exist only in the CDC Fortran Version 4 compiler
which compiled the FORTRAN 66 language.

-- Daniel Pommert
   Computing Services Office
   University of Illinois
   1304 W. Springfield, Rm. 150
   Urbana, IL 61801-2987
   (217)333-8629
   daniel@uxh.cso.uiuc.edu (Internet)
   DANIEL@UIUCVMD          (Bitnet)