main loop wordpress

wp.loop.php

<!-- Start the Loop. -->
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
    <div class="post">
        <h2>
            <a href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>">
                <?php the_title(); ?>
            </a>
        </h2>

        <small>
            <?php the_time('F jS, Y'); ?> by <?php the_author_posts_link(); ?>
        </small>

        <div class="entry">
            <?php the_content(); ?>
        </div>

        <p class="postmetadata">
            <?php _e( 'Posted in' ); ?> <?php the_category( ', ' ); ?>
        </p>
    </div>

<?php endwhile; else : ?>

    <p>
        <?php _e( 'Sorry, no posts matched your criteria.' ); ?>
    </p>

 <?php endif; ?>
<!-- Stop The Loop. -->