text: """
  Lecture 6
  """
  
  demo_str = 'this is my string'
  
  #for str_item in demo_str:
  #    print(str_item)
  
  #for word_item in demo_str.split():
     # print(word_item)
     # for str_item in word_item:
      #    print(str_item)
      
  #for each_num in range(1,5):
  #    print(each_num)
  
  num_list = [213,321,123,312]
  max_item = num_list [0] #max_item is the placeholder, and use the first item in the list as the initial value  
  
  for num in num_list:
      if max_item<= num:
          max_item = num
          
  print(max_item)
  
  
      
      