input: Write a function to print the length of a given string. The function should take one argument, the string, and use the `len()` function to determine its length.
  assert print_string_length("Python")==None
  assert print_string_length("Programming")==None
  assert print_string_length("Code")==None
  assert print_string_length("")==None
output: def print_string_length(s):
      print(len(s))