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Re: FOR NEXT loop
« Reply #3 on: Jun 26th, 2013, 08:19am »
Thanks, that IS interesting. I'd also always assumed it went back to the FOR... statement, and had wondered, but never tested, whether the end condition was changeable.
I note that changing the control variable WILL alter the looping, though.
I note that changing the control variable WILL alter the looping, though.
Since BBC BASIC is interpreted there's no way it can tell that you've changed the value of the control variable 'behind its back'. Before the advent of EXIT FOR the standard way of prematurely exiting a FOR...NEXT loop was to set the loop variable to (or past) the limit value. Setting it past the limit value provided a convenient way of being able to test, on exit, whether it was terminated prematurely or not.
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