If i stay under 2000 calories eat what i want and drink coke zero and sparkling water can i still lose weight that's what i was told from my doctor other people may say different but can i do this i was told your calories determines if you lose?

Depends: Weight gain or loss is a balance of caloric intake and caloric expenditure. You if you not expending more than 2000 calories through physical activity, you could gain weight with or without diet drinks. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.

Lifestyle changes: Diet and physical exercise remain the mainstay of any weight loss program. Joining a weight loss group or program may help in keeping you focused and keeping up with realistic goals. Controlling your calorie intake is otherwise critical, but only a part of a comprehensive weight loss program.

Maybe: The short answer is maybe. Your current weight and level of physical activity (in addition to your age & sex)determine your caloric needs. Also while it is true that a calorie is a calorie, you will feel more satisfied and will feel fuller longer if you eat foods that are high in protein, fiber&healthy fats.Foods high in carbs tend to be digested more easily, so you feel hungry again soon after