num = int(input("Please enter a number: "))
  if num < 2:
      print(num, "is not prime")
  else:
      i = 2
      while i * i <= num:
          if num % i == 0 and num != 2:
              print(num, "is not prime")
              break
          i += 1
      else:
          print(num, "is prime")