WordPress Single.php Page code

<?php if(have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<div class="single_post">
    <div class="post_heading">
    <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2> </div>
    <div class="post_info"> Posted In: <?php the_category(', '); ?>| Posted On <?php the_time('M d, Y') ?> <?php comments_popup_link('No Comment', '1 Comment', '% Comments'); ?> </div>
    <div class="post_content"> <?php the_content(); ?> </div>
    <?php comments_template( '', true ); ?>
</div>
<?php endwhile; ?> <?php else : ?>
<h3><?php _e('404 Error&#58; Not Found'); ?></h3>
<?php endif; ?>