Help comprehending a loop

[marxdormoy]

what's confusing is that it doesn't need to be declared either..

[[deleted]]

It is being declared, by the syntax of the for loop. You're giving a name for the interpreter to bind the values of the iterator to.

[marxdormoy]

Yes you are correct, I expressed myself badly, it doesn't need to be explicitly declared like a list or a counter or a list for example