Hi, To add a little more to the discussion. I know in UniVerse this is true and I suspect it is true in other flavors of Pick.
If you wrap a variable in parenthesis it will be treated as a Boolean test. For example: A='' IF (A) THEN CRT 'TRUE' ELSE CRT 'FALSE' will result in FALSE. A=0 IF (A) THEN CRT 'TRUE' ELSE CRT 'FALSE' will result in FALSE. A='HELLO' IF (A) THEN CRT 'TRUE' ELSE CRT 'FALSE' will result in TRUE. A=1 IF (A) THEN CRT 'TRUE' ELSE CRT 'FALSE' will result in TRUE. I have found this useful in coding. Tom Whitmore RATEX Business Solutions -----Original Message----- From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Brian Leach Sent: Thursday, August 01, 2013 4:40 AM To: 'U2 Users List' Subject: Re: [U2] What is true To clarify In multivalue, True is not False, where False is anything that is 'falsy' i.e. zero or empty. Obviously different than other languages, notably those where true is -1 (all bits set on a signed integer). So: A = "HELLO" IF A THEN CRT A :" WORLD" Gives HELLO WORLD Regarding file variables, the best way to check for these being assigned on UniVerse is to use FILEINFO(). If FileInfo(SomeUnassignedVariable, 0) Then Crt "This is an open file variable" End Else Crt "This isn't" End Brian _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
