Javascript Closure - Job Interview Test

So recently I was at a job interview and the following question appeared:

What will be the output of the following:

function print(i) {
    console.log(i);
}

function call() {
    for (var i=0;i<5;i++) {
        window.setTimeout(function() {
            print(i);
        }, 0);
    }
}

call();

The answer is that 5 will be printed 5 times to the log.

But why? What's going on here?

They told me it has to do with javascript's closure, but I don't really get what's happening in this scenario.

Thanks!