Going without food for one day won't really hurt you and could help you lose weight as long as you exercise to burn off more calories.
It's best though to eat small portions of food throughout the day with lower calories when you're trying to lose weight.
You still need energy and food gives us energy which we need to exercise.
Walk or jog at least a mile everyday to help lose weight while eating the proper diet and you'll eventually lose weight.
In fact you'll lose more weight faster if you do exercise and eat small portions and watch your calorie intake.