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Start your free trialMalik Martin
524 PointsWhen I get to total my code spits out "your total is None." I'm not sure how I am getting this. Iv been following along.
TICKET_PRICE = 10
tickets_remaining = 100
def calculate_price(num_tickets): result = num_tickets * TICKET_PRICE
while tickets_remaining > 0: print("There are {} tickets remaining.".format(tickets_remaining)) name = input("What is your name?\n") number_of_tickets = (input("How many tickets would you like {}?\n".format(name))) try: number_of_tickets = int(number_of_tickets) if number_of_tickets > tickets_remaining: raise ValueError(" There are only {} tickets remaining.".format(tickets_remaining)) # Raise value error if request is for more tickets than are available except ValueError as err: #include error text in the output print("Make sure you enter a valid number and try again.{}".format(err)) else: total = calculate_price(number_of_tickets) print("{}, your total is {}.".format(name, total)) proceed = input("Would you like to proceed {}? Y or N\n".format(name)) if proceed.capitalize() == "Y": # TODO: Gather CC info print("Sold!") tickets_remaining = tickets_remaining - number_of_tickets print(tickets_remaining, "Ticket remaining.") elif tickets_remaining == 0: break else: print("Thank you anyways, {}.".format(name))
print("Sold Out!")
1 Answer
Joseph Yhu
PHP Development Techdegree Graduate 48,637 PointsYour calculate_price
function isn't returning anything.
Charlie Bird
7,277 PointsCharlie Bird
7,277 PointsGood catch Joseph.
The calculate_price function is assigning the total cost of num_tickets * TICKET_PRICE to the variable 'result', however the function needs to return the result to make it usable in other parts of the programme.
There should be another line in the function that says
return result
Alternatively you don't need to assign the result variable at all and can just return the outcome of the calculation within the function like this:
return num_tickets * TICKET_PRICE