input: Write a function to return the length of a given string.
  
  def get_string_length(string):
      return len(string)
  
  assert get_string_length("Python") == 6
  assert get_string_length("Java") == 4
  assert get_string_length("") == 0
  assert get_string_length("Programming") == 11
  assert get_string_length("OpenAI") == 6
output: def get_string_length(string):
      return len(string)