What is a Low calorie diet?
A low-calorie diet is a diet where you consume fewer calories than your body uses.
That is, if your body burns 2500Kcal and eats only 2000Kcal, you are following a hypocaloric regimen.
What a low-calorie diet is for you may not be for your colleague next door.
It is important to know the calories you use daily, since person A can spend 2000Kcal daily and person B 3000Kcal daily, a diet of 2500Kcal will be hypercaloric to person A and hypocaloric person B.
Low-calorie diets are used to lose fat/weight.