new_contents: #!/usr/bin/env python
  
  '''
  1. Create a function that returns the multiplication product of three parameters--x, y, and z. z should have a default value of 1.
      a. Call the function with all positional arguments.
      b. Call the function with all named arguments.  
      c. Call the function with a mix of positional and named arguments.
      d. Call the function with only two arguments and use the default value for z.
  '''
  
  # Func defenition
  def multi_three(x, y, z = 30):
      return x * y * z
  
  # Main prigram
  
  a = 10
  b = 20
  c = 30
  
  multipl = multi_three(10, 20, 30)
  print "A. Call the function with all positional arguments. ==> %d" % multipl
  
  multipl = multi_three(a, b, c)
  print "B. Call the function with all named arguments. ==> %d" % multipl
  
  multipl = multi_three(a, z = c, y = 20)
  print "C. Call the function with a mix of positional and named arguments. ==> %d" % multipl
  
  multipl = multi_three(a, b)
  print "D. Call the function with only two arguments and use the default value for z. ==> %d" % multipl
  
  # The END
  
subject: Create ex6_1.py