as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
write a function to find the longest word in a sentence.
user
def find_longest_word(str): 
  words = str.split() 
  longest_word = ""
  longest_length = 0
  for word in words: 
    word_length = len(word) 
    if word_length > longest_length:
      longest_length = word_length
      longest_word = word 
 
  return longest_word
assistant