input: Write a function to print the maximum number from a given list of integers. If the list is empty, the function should print "No numbers provided".
  
  def find_max(numbers):
      if not numbers:
          print("No numbers provided")
      else:
          max_number = numbers[0]
          for num in numbers[1:]:
              if num > max_number:
                  max_number = num
          print(max_number)
  
  assert find_max([5, 4, 2, 7, 12])==None
  assert find_max([])==None
output: def find_max(numbers):
      if not numbers:
          print("No numbers provided")
      else:
          max_number = numbers[0]
          for num in numbers[1:]:
              if num > max_number:
                  max_number = num
          print(max_number)