Display a Tag Cloud in WordPress

<?php

wp_tag_cloud( array(

    'smallest' => 8,          // font size for the least used tag
    'largest'  => 24,         // font size for the most used tag
    'unit'     => 'px',       // font sizing choice (pt, em, px, etc)
    'number'   => 50,         // maximum number of tags to show
    'format'   => 'flat',     // flat, list, or array
    'orderby'  => 'name',     // name = alphabetical by name; count = by popularity
    'order'    => 'ASC',      // starting from A, or starting from highest count
    'exclude'  => 12,         // ID's of tags to exclude, displays all except these
    'include'  => 13,         // ID's of tags to include, displays none except these
    'link'     => 'view',     // view = links to tag view; edit = link to edit tag
    'taxonomy' => 'post_tag', // post_tag, link_category, category
    'echo'     => true        // set to false to return an array, not echo it

));

?>