text: """
  File: largest_digit.py
  Name: Elaine Chu
  ----------------------------------
  This file recursively prints the biggest digit in
  5 different integers, 12345, 281, 6, -111, -9453
  If your implementation is correct, you should see
  5, 8, 6, 1, 9 on Console.
  """
  
  
  def main():
  	print(find_largest_digit(12345))      # 5
  	print(find_largest_digit(281))        # 8
  	print(find_largest_digit(6))          # 6
  	print(find_largest_digit(-111))       # 1
  	print(find_largest_digit(-9453))      # 9
  
  
  def find_largest_digit(n):
  	"""
  	:param n: int, the number to find the largest digit
  	:return: int, the largest digit
  	"""
  	if n > 0:
  		return find_largest_helper(n, 0)
  	else:
  		return find_largest_helper(-n, 0)
  
  
  def find_largest_helper(n, maximum):
  	"""
  	:param n: int, the number to find the largest digit
  	:param maximum: int, the largest digit
  	:return: int, the largest digit
  	"""
  	if n % 10 > maximum:
  		maximum = n % 10
  	if n / 10 == 0:
  		return maximum
  	else:
  		return find_largest_helper(n // 10, maximum)
  
  
  if __name__ == '__main__':
  	main()
  