Difference between 'To' and 'Until'

Is there any? In the context of a For\Next loop, that is.

For a = 0 To 10
Next

For a = 0 Until 10
Next

How are they different?

Russell

Russell

The first loop will loop through 0,1,2,..8,9,10, the second 0,1,2,..8,9.

For a = 1 Until x

Is equivilant to

For a = 1 To ( x - 1 )

Except that Until should be ever so slightly faster.

thats cool because arrays start at 0.
array[amount]
you would want to loop 0 to (amount-1)

It is primarily useful for looping through arrays and strings. Instead of having to remember to do this:

For Local i=0 to (arrayVar.length-1)
...
Next

You can just do this instead:

For Local i=0 Until arrayVar.length
...
Next

The difference isn't very significant, but I still find it quite handy.

For/Until skips the last loop. Its main use is for iterating through zero-based data (eg. 5 items with values 0, 1, 2, 3, 4) without having to remember to use -1 on the end value -- you just go For a = 0 Until 5 to iterate through 5 zero-based items.

Hmm... Not so sure if that is actually useful, but ok. :^/ Useful perhaps in some cases, but just weird enough to confuse the newbie (and also not explained in the manual...)

But thanks for the reply!

Russell

I use Until probably more than I use To. It's second to none when you're working with arrays.

I guess I've just gotten so used to doing it the 'old' way... Darn progress! ;)

Russell

I've been using BLtiz for years and I didn't even know you could do that. I wouldn't use it. I'm old frashined that way.

Seems kind of silly for it to even be there.

[edit]
Pfft, I'm reading the BlitzMax forum... no wonder. :-)

STILL SILLY TO ADD IT.
[/edit]