I was making a simple calculator from just a test of my skills, and I put a not infront of my contain stuff, but when i run it, even if it contains only numbers, it still returns an error! i tried this: if not "1" or "2" or "3" or "4" or "5" or "6" or "7" or "8" or "9" or "0" in number1 or number2: print("Error! One of the numbers is not an number!") quit() Continue reading...
