Adjustment of Status - I-485

Hello everyone, I finally got my interview scheduled. Im really happy and nervous. I submited my forms back on Nobembre 27, 2017. I got my combo card on April 2018 and my interview got schedule on June 6, 2018. I'm still waiting for the actual interview date. I have a question and hopefully soneone can answer me. Do they tell you if you get approved at the end of the interview?? Or am I gonna have to wait for a responce in the mail?? I know every case is different but I'm just tired of waiting, also because I've been seeing that people who filed on January 2018 already have their green cards on hand. I hope I don't have to wait more time. Anyways good luck to everyone out there and congrats to everyone who is done with this process.