Given the following code, what will be the output if there are 3 posts in category 10?

Given the following code, what will be the output if there are 3 posts in category 10?

$query = new WP_Query(['cat' => 10]);
if ($query->have_posts()) {
  while ($query->have_posts()) {
    $query->the_post();
    echo get_the_title() . ', ';
  }
} else {
  echo 'No posts found';
}
wp_reset_postdata();