Is swiss cheese okay 2 have when maintaining weight? I get the cheese slices from the deli so it's healthier and fresh. I don't even eat halfthe slice

Yes. Any food is reasonable if you moderate it to your overall energy balance. Calories in must = calories out, or else weight gain occurs; an olympic athlete can eat like a pig, calorie wise, but their exertion and metabolism allows them to burn off the calories they take in.