Loop syntax

Hello guys, I was just curious why this works

backticks
<php if(have_posts()) : ><?php while(have_posts()) : the_post(); >
<?php endwhile; >
<?php endif; >
backticks

and this doesn’t

backticks
<?php
if (have_posts())
{
while (have_posts())
{
the_post();
}
}
>
backticks