Re: BBC and DEFINT etc [Was: Using GOTO]

On Sep 10, 4:44 pm, "Judson McClendon" <ju...@[EMAIL PROTECTED]
> wrote:
> But the initial conditions aren't meangless, they're simply false.

I disagree (again).  There are no Boolean terms at all in the BASIC
FOR statement, so there cannot be any concept of it being 'false'.
You are perhaps getting muddled with C, in which the 'for' statement
does include a Boolean term.  Or perhaps you are thinking about how
FOR..NEXT is implemented internally, which is equally irrelevant.

> The begin, end and step values can all be variables, determined
> at runtime.

Yes, but no combination of 'begin', 'end' and 'step' implies 'do
nothing'.  Rather than saying "I didn't go to the office today" do you
say "I came home from the office, without leaving home"?  Do you think
they mean the same thing?

> In "DO ... WHILE (condition)" the termination condition is located at
the
> bottom of the loop, and is tested at the bottom of the loop.

It's called REPEAT...UNTIL in BBC BASIC (the terminating condition is
the opposite of DO...WHILE: 'true' to exit the loop).

> In "FOR n  = begin TO end (condition) [STEP step] ... NEXT n" the
> termination condition is located at the top of the loop, and should be
> tested at the top of the loop.

I don't think the positioning of the FOR statement at the beginning of
the loop has any bearing on this whatsoever.

Richard.
http://www.rtrussell.co.uk/
To reply by email change 'news' to my forename.