how to show login or logout in magento

1.  login or logout in magento.

 <?php

$loggedIn = $this->helper("customer")->isLoggedIn();
if($loggedIn == 1)
{
echo "<a href=\"".Mage::getBaseUrl()."customer/account/logout/\" />Log out</a>";
 }
else{ echo "<a href=\"".Mage::getBaseUrl()."customer/account/\" />Log in</a>"; }
?>




 2. login or logout in magento.

<?php
if ($this->helper('customer')->isLoggedIn() )
{
echo '<a href="<?php echo $this->getUrl('customer/account/login/');?>">Login</a>';
}
else
{
echo '<a href="<?php echo $this->getUrl('customer/account/logout/');?>">Logout</a>';
}
?>