input: Write a function to print the strings "Hello" and "World" on the same line with a space in between. The function should return None after printing the strings. If no strings are provided, it should print "No strings provided".
  assert print_strings(["Hello", "World"])==None
  assert print_strings(["Hello", ""])==None
  assert print_strings(["Hello"])==None
  assert print_strings([])==None
  assert print_strings(["", ""])==None
output: def print_strings(strings):
      if len(strings) == 0:
          print("No strings provided")
      else:
          print(" ".join(strings))