How to add conditional if is guest

  • Hello,

    I disabled replying on articles for guests so that only logged in users can reply, but I want to show a text near the reply box with the conditional if it is guest, show SOMETHING, so that the guest would know he should register.

    For example in my website, you see there are 6 replies. In the left side of H2 title replies, I want to add a text.

    How may I use this?

    I did not find proper documents to see the conditionals.

    I also found I should add this conditional in templates/article.tpl if I'm correct.

    Thanks in advance