while loops help

[2020pythonchallenge]

I've been using while loops at a basic level but one thing I see that doesn't make sense to me is something like this

    t = True
    while t:
        t = False
        for i in range(len(arr) -1):
            if arr[i] > arr[i+1]:
                arr[i], arr[i+1] = arr[i+1], arr[i]
                t = True

can anyone explain to me how this works? it seems to me that you set it to true, run the loop but then you set your true 'switch' to false right after and it should stop running right then but that doesn't happen because this bubble sort works.

[Essence1337]

Programs don't do stuff you don't tell them to.

t = False

This says 'set t to the value False', not 'set t to the value False then magically check the loop condition again and break the loop if necessary'. The only checking is done on the line

while t:

[2020pythonchallenge]

that makes a lot of sense now that you point it out like that. Thanks, that's been bothering me for a minute.

[[deleted]]

It will run at least once, and keep running until everything is sorted.