the loop

    $secondary_query = new WP_Query( 'category_name=example-category' );        
                                                                                 
    // The second loop. if ( $secondary_query->have_posts() ) 
    echo '<ul>';
    while ( $secondary_query->have_posts() ) :
        $secondary_query->the_post();
        echo '<li>' . get_the_title() . '</li>';
    endwhile;
    echo '</ul>';