Display only posts from one category

Wordpress provide query_post() function for alter the default query for display post. query_post() display post based on specified category and other display option like post per page etc.

Following is the code for display only one category post with pagination.

<?php
query_posts('category_name=category1&showposts=50'.'&paged='.$paged);
while ( have_posts() ) : the_post();
 echo '<li>';
 the_title();
 echo '</li>';
endwhile;
?>