>Relative newbie question....
>
>I'm supporting a VFP6 app written by a developer who was familiar with FPW 2.6 and never really took the time to get up to speed on VFP6. In several places, he uses the DO WHILE .T. .... ENDDO construct.
>
>Hacker's Guide describes it as being a poor programming practice, but doesn't explain the logic. Help has an example in the DO WHILE article, but doesn't explain what is being tested for a .T. condition.
>
>My problem is in thinking through the logic. What is the condition being evaluated, and when does it evaluate to .T. or .F.?
>
>Can someone please enlighten me?
>
>Thanks and Merry Christmas.....
>
Neil,

DO WHILE .T. is a poor practice because .T. will never equal NOT .T. It sets up an infinite loop, and requires that somewhere in the code EXIT must appear to get out of the loop. Much better would be something like:

lldone = < some logical condition >
DO WHILE NOT lldone
  * Code here
  lldone = < some logical condition to terminate the loop >
ENDDO

hth,