input: Write a python function to print each character of a given string on a new line.
  assert print_each_char("Hello") == None  # The output should be 'H\n' 'e\n' 'l\n' 'l\n' 'o\n'
  assert print_each_char("Python") == None  # The output should be 'P\n' 'y\n' 't\n' 'h\n' 'o\n' 'n\n'
  assert print_each_char("12345") == None  # The output should be '1\n' '2\n' '3\n' '4\n' '5\n'
output: def print_each_char(string):
      for char in string:
          print(char)