Do you avoid carbohydrates entirely when dieting? I'm curious about the appropriate intake amount!

I tried to lose weight quickly by cutting out almost all carbohydrates for a few days and sticking to protein and vegetables. My body definitely feels lighter, but I have absolutely no energy and feel like I have no strength at all when exercising. I'm curious how much healthy carbohydrates, like sweet potatoes or brown rice, you all include in your diets! Please share any diet tips you have~