# Tutorial 2 - Problem 8

def any_lowercase1(s):
  """ This function only looks at the first letter in s
      returning True if it is lowercase, False otherwise.
  """
  for c in s:
    if c.islower():
      return True
    else:
      return False

def any_lowercase2(s):
  """ This function always returns 'True' since hard-coded
      or literal value 'c' is a lowercase letter.
  """
  for c in s:
    if 'c'.islower():
      return 'True'
    else:
      return 'False'

def any_lowercase3(s):
  """ This function returns True if the last letter is a lowercase
      or False if the last letter is an uppercase.
  """
  for c in s:
    flag = c.islower( )
  return flag


def any_lowercase4(s):
  """ This function returns True if there is at least one lowercase
      letter in s, False otherwise.
  """
  flag = False
  for c in s:
    flag = flag or c.islower( )
  return flag

def any_lowercase5(s):
  """ This function returns False at the first occurrence of an upper
      case letter in s, otherwise it continues to parse s until it has
      reached its last lowercase letter, then returns True.
  """
  for c in s:
    if not c.islower():
      return False
  return True

# Main part of the program
print('any_lowercase1("ABCEd")): ', any_lowercase1("ABCEd"))
print('any_lowercase2("ABCEd")): ', any_lowercase2("ABCEd"))
print('any_lowercase3("ABCEd")): ', any_lowercase3("ABCEd"))
print('any_lowercase4("ABCEd")): ', any_lowercase4("ABCEd"))
print('any_lowercase5("ABCEd")): ', any_lowercase5("ABCEd"))

# What other test cases will you use to test these functions?

# Challenge: can you modify the functions above such that they all have only one "return" statement?