WordPress get ajax full url

In Wordpress we can get the full Ajax url as follows:

In PHP we can get it in the following way.

<?php echo admin_url('admin-ajax.php'); ?>

If you want to use it in Javascript then you can use it in following way.

<script type="text/javascript">
    var ajaxurl = "<?php echo admin_url('admin-ajax.php'); ?>";
</script>