We can have carbs. They just have to be complex carbs. Stay away from simple carbs. Complex carbs give you energy and make you feel full longer. They take longer for your body to digest. Simple carbs leave you feeling hungry, so you'll want eat again way sooner. Complex carbs are vegetables, 100% Whole Wheat Breads, 100% whole wheat pastas, 100% whole wheat crackers, & 100% whole wheat oats.
Keep in mind it has to be 100% whole wheat or 100% whole grain. It can't say "made with whole wheat" or "made with whole grain". Check the nutritional facts on the side of the box or the back of the box for sugar. It needs to have the no sugar or lowest amount of sugar available.
Remember complex carbs is the smart way to eat. Simple carbohydrates is bad eating and leads to weight gain.