Can you lose weight by not eating at all

yes because no food is gaining you weight .
Well yes you can, BUT it's not very healthy. You see when the body runs out of food it's starts to eat off your body fat causing you to get skinny slowly. So try to not eat so many sugar foods and choose a carrot in low-fat ranch dressing, a juicy apple, or a 'nanna with peanut butter. Hope this helped! :)