JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Using For Loops with Arrays

Mick Webb
Mick Webb
2,246 Points

Code is not printing to the HTML page after writing it from the video.

This is my playlist.js code: I have followed the video along step by step:

var playList = [ 'I Did It My Way', 'Respect', 'Imagine', 'Born to Run', 'Louie Louie', 'Maybellene' ];

function print(message) { document.write(message); }

function printList( list ){ var listHTML = '<ol>'; for ( var i = 0; i < list.length; i+= 1) { listHTML += '<li>; + list[i] + '</li>'; } listHTML += '</ol>'; print(listHTML); } printList(playList);

Once I save the file and launch it in the browser, nothing shows except for "My Music Playlist" at the top. Please help, thanks.

2 Answers

Aakash Srivastava
Aakash Srivastava
5,412 Points

Hey Mick Webb , you have problem in concatenating the string . Here is your code having errorr :

listHTML += '<li>; + list[i] + '</li>';      // you have inserted semicolon in between concatenation and also forgot to enclose first <li> here within single quote

Here is the right way :

var playList = ['I Did It My Way', 'Respect', 'Imagine', 'Born to Run', 'Louie Louie', 'Maybellene'];

function print(message) {
    document.write(message);
}

function printList(list) {
    var listHTML = '<ol>';
    for (var i = 0; i < list.length; i += 1) {
        listHTML += '<li>' + list[i] + '</li>';
    }
    listHTML += '</ol>';
    print(listHTML);
}

printList(playList);

Hope it helped :)

Mick Webb
Mick Webb
2,246 Points

Thanks a lot, much appreciated!