number of posts per page

Hi,

Does anybody know how to limit the number of posts per page? I was able do it using the Page Builder plugin but there’s no link to show the older posts/newer posts. So I’m trying to figure out how to add pagination. Note that I’m using a child theme of Twenty Thirteen.

Any help would be appreciated!

Here’s a snippet of code from my content.php (child theme of Twenty Thirteen)

<?php twentythirteen_entry_date(); ?>
 <?php edit_post_link( __( 'Edit', 'twentythirteen' ), '<span class="edit-link">', '</span>' ); ?>
 </div>
  	</div>
    </div>
    </div>

	</div><!-- .entry-summary -->

	<?php else : ?>
	<div class="entry-content">
		<?php
			/* translators: %s: Name of current post */
			the_content( sprintf(
				__( 'Continue reading %s <span class="meta-nav">&rarr;</span>', 'twentythirteen' ),
				the_title( '<span class="screen-reader-text">', '</span>', false )
			) );

		   wp_link_pages( array( 'before' => '<div class="page-links"><span class="page-links-title">' . __( 'Pages:', 'twentythirteen' ) . '</span>', 'after' => '</div>', 'link_before' => '<span>', 'link_after' => '</span>' ) );
		?>

	</div><!-- .entry-content -->

	<?php endif; ?>

</article><!-- #post -->