Decrementing a loop counter as loop is executing

Question

I\'m trying to decrement the counter of a for loop as the loop is running. Unfortunately, Lua doesn\'t seem to allow that. This piece of code should run forever:

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Answer 1

It's by design. From Lua reference manual:

3.3.5 – For Statement

All three control expressions are evaluated only once, before the loop starts. They must all result in numbers.

So modifying the value of i inside the loop won't change how the loop runs.