WP_Query

$args  = array();

$query = new WP_Query( $args );


if ( $query->have_posts() ) {

  // Have posts before loop

  while ( $query->have_posts() ) { $query->the_post();

    // Loop Output

  }

  // Have posts after loop

} else {

  // Nothing here :(

}

wp_reset_postdata();