input: def max_of_three(a, b, c):
      if a > b and a > c:
          return a
      elif b > a and b > c:
          return b
      else:
          return c
      
  result = max_of_three(3, 4, 5)
  print(result)
output:     
      if a > b and a > c:
          return a
      elif b > a and b > c:
          return b
      else:
          return c
      
  result = max_of_three(3, 4, 5)
  print(result)
  