<?php if ( have_posts() ) : ?>
while ( have_posts() ) : the_post(); ?>
endwhile;
the_posts_pagination( array(
'prev_text' => ( 'Previous page', 'twentyfifteen' ),
'next_text' => ( 'Next page', 'twentyfifteen' ),
'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
) );
endif;
?>