If you live off campus this probably won't be a problem because you get home cooked meals on a regular basis. As a freshman you'll be more than likely eat a lot of junk food during your first semester. You should never replace a meal with junk food. You will eat who knows how many bags of chips. You will drink a ton of soda.
Pop machines are everywhere on campus.
Even if you don't want to walk across the street to the store, there are snack machines and pop machines to help that late night craving. After wasting a lot of money on junk food a thought came to mind. Most people have a refrigerator in their dorm rooms. If you don't like to go out late or night or if you don't like to eat in the cafeteria, you can buy your own food. After I thought about it I started going to the grocery store to fill up my fridge.