How does Loop Breaking work?

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#1

Hi, I have been trying to learn loop breaking i kinda get but not 100% BUT I still get a little confused.

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#2

The break keyword breaks the innermost loop. I believe this is what you mean, if not please tell me. Because breaking is pretty self explanatory

Example

while true do
    while true do
        print("Innermost loop broken!")
        break
    end
    print("Outermost loop not broken!")
end
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#3

Yeah, that’s it also why did you use 2 while do loops?

#4

He used 2 while do loops in order to show you that if you use break, it will break the second loop and not the first, so in his case:

It will print “Innermost loop broken!” once, and since he breaks it, it will print “Outermost loop not broken!”
continuously

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#5

Oh ok thanks, Have a great day!

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#6

IF you want to break the entire loop, do something like this:

local breakCondition = false

while true do
    while true do
        print("Breaking the inner loop!")
        breakCondition = true
    end
    
    if breakCondition then
        print("Breaking the outer loop!")
        break
    end
end
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#7

What break does is skip to the end of the loop/exit the loop the break is in (the innermost loop).
Ex:

while true do
 while true do 
  break -- 1
 end
-- 1 That break will skip here
break -- 2
end
-- 2 will skip here
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#8

That checks if the variable isn’t equal to nil - what you’re looking for is

if breakCondition == true then

or set

to nil.

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#9

Nope, it passes if the value is truthy (i.e., not false or nil). Comparing to a boolean is even worse practice, since it’s already a boolean. marfit’s code doesn’t even work anyways since the nested while loop prevents the if branch from executing

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#10

The if statement will never be reached because the inner while loop does not terminate. I get it’s for the sake of demonstration but this example’s sort of strange, especially considering you’re not using the conditional of the while loop when it could be used in all cases.

local breakCondition = false

while (true) do -- Non-terminating
    while (breakCondition == false) do
        breakCondition = true
    end

    if (breakCondition) then -- Not falsy
        break -- Can just use the conditional though
    end
end
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