How to read the text file and show the information on the page?

How to read the text file and show the information on the page?

Hi guys!
Please, be gentle to me! I’m just trying to get into jQuery…

My first try is to read a text file and put information read on the page.
I found, modified a little and used this code:
  
<script>
 $.get('Files/Address.txt', function(textData, status) {
    var aLines = textData.split("\n")

    alert(textData + '\nStatus = ' + status);   // this works, all lines

                                             from the file are displayed

    $.each(aLines, function(n, sLine) {
       $('#textFromFile').append('<div>' + sLine + '</div>'); // ?????
       alert(n + ' - ' + aLines[n]);      // this also work
    });
    alert("File read OK");
 }, 'text');
</script>

From the example I found, I left the line “$('#textFromFile').append('<div>' + sLine + '</div>');”, but have no idea what it is for.
Can you, please, try to explain it to me and tell how it can be used?
Also: how can I pass aLines[n] to the page?

Thank you in advance!

Tom