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Python Python Basics All Together Now Branch and Loop

Posted by Regina Ackah
Regina Ackah
2,649 Points

my code does NOT subtract

please help me solve the issue with my code. tickets_remaining does not subtract after I can't seem to find the problem at all.

while tickets_remaining >=1 : print("We have {} tickets remaining".format(tickets_remaining)) name = input("What is your name? ") num_tickets = int((input("How many tickets do you need {} ".format(name)))) user_price = num_tickets * TICKET_PRICE print("Total due is ${}".format(user_price)) proceed = input("do you want to continue? Y/N ") if proceed.lower() == "Y": print("sold") tickets_remaining = tickets_remaining - num_tickets else: print("Thank you {}".format(name)) print("Sorry the tickets are sold out ")

AJ Tran
AJ Tran
Treehouse Teacher
AJ Tran
AJ Tran
Treehouse Teacher

You can wrap your code in triple backticks to format it neatly. When you open the text editor to make a post or comment, there is a link that says

Reference this Markdown Cheatsheet for syntax examples for formatting your post.

And there is an example in there.

while tickets_remaining >=1 : 
    print("We have {} tickets remaining".format(tickets_remaining)) 

    name = input("What is your name? ") 
    num_tickets = int((input("How many tickets do you need {} ".format(name)))) 
    user_price = num_tickets * TICKET_PRICE 

    print("Total due is ${}".format(user_price)) 
    proceed = input("do you want to continue? Y/N ")

    if proceed.lower() == "Y": 
        print("sold") tickets_remaining = tickets_remaining - num_tickets 
    else: 
        print("Thank you {}".format(name)) 
        print("Sorry the tickets are sold out ")

1 Answer

AJ Tran
STAFF
AJ Tran
Treehouse Teacher
AJ Tran
AJ Tran
Treehouse Teacher

Hi Regina Ackah! I found a little bug in your conditional :)

if proceed.lower() == "Y":
    tickets_remaining = tickets_remaining - num_tickets

proceed.lower() is never going to be equal to "Y"! Because the code will always compare a lowercase letter to a capital letter. It will always return False, so your next line of subtracting code will never run.

So the easiest fix would be to change your conditional to compare against a lowercase "y".

It happens to everyone! One character will ruin the whole program with a bug and sometimes you just need another person to read the code :)

Regina Ackah
Regina Ackah
2,649 Points

oooh Thanks soo much, i have been on this for hours.