Pre-fill form field with username

I'm trying to pre-fill this form field with the username.

The username was not defined in the code so I added it:
[PHP]$user =& JFactory::getUser();[/PHP]

The Form looks like this:
[PHP]<div class="appLabel"><?php echo JText::_( 'Your name:' ); ?></div>
<div class="appInput">
<input class="inputbox hasTip" title="Enter your full name to register an appointment." type="text" name="title" id="title" value="" "/>
</div>[/PHP]

where value="" I have tried:

value="<?php {$user->username} ?>"
or
value="{$user->username}"
or
value={$user->username}

...no joy, what am I doing wrong please?