Bill Briggs wrote on 06/29/2006 03:30:32 PM:
> At 2:04 PM -0400 6/29/06, eric.dunn at ca.transport.bombardier.com wrote:
> >Firstly, logically speaking, isn't there a difference between:
> >- If A, and then B
> >and
> >- If A and B

> From the point of view of someone who is used to such structures in 
> programming languages the first variant would never be used; the 
> "and" would simply not be there.

But it is how I would describe, in writing, the construct of nested Ifs:

  If A
    {DO THIS}
    If B
      {DO THIS}
    EndIf
  EndIf
Where there may be any amount of code, waiting or looping before you get 
to the If B and indeed the end of the If A statement.

Or perhaps:

  If A
    {Wait for B} -- specified or indeterminate wait time
  EndIf

Or perhaps:

  {Wait for A}
  If B
    {DO THIS}
  EndIf 

In either of the above, A could become False at anytime after the test or 
after the wait as the test for B and the execution of the related code is 
not dependant on A.

The second one is simply

If (A) AND (B)
  {DO THIS}
EndIf

perhaps an interesting side step into logic, but pretty irrelevant to the 
thread.

Eric L. Dunn
Senior Technical Writer

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