Count all div elements and add each number inside span using jQuery

Question

I need to show each number of div in the page in order

And add the value of each div inside span

so if I have 4 divs inside page like this

Answer 1

var counter = 1;
$('h1').each(function () {
    $(this).find('span').html(counter);
    counter++;
});

jsFiddle example