''' Purpose: demonstrate optional parameters
'''

def chant( msg="Wahoo Wa", times=3 ) :
    
    for i in range( 0, times ) :
        print( msg )

if ( __name__ == '__main__' ) :

    chant() # Optional parameters allows you to use the default values the
            # user provided in the function definition for the parameter
            # It says "Hey! If you don't give me an argument, I'm just going to
            # use this default value."
            # ^ as seen above parameter = default value

    print()

    chant( msg='Hip hip hooray!' ) # Passing in argument 'Hip hip hooray'
                                   # for the parameter msg but default value for
                                    # times is still 3!

    print()

    chant( times=5 ) # Pass in 5 as argument for parameter times but msg is still
                    # the default value of "Wahoo wa"

    print()

    chant( 'We are CS 1112', 1 ) # Now we pass in two arguments! The parameters
                                # get the argument values in the same order
                                # (normal function calling) so
                                # msg gets 'We are CS 1112' and times gets 1

    # Optional parameters allow you to either pass in the argument you want
    # or a default value passed in as the arguments for those parameters!