Exercise 05-15:
Write a program to control a small cash register. You must ask the user to enter the product code and the purchase quantity. Use the following code table to obtain the price of each product:
Code Price
1 0.50
2 1.00
3 4.00
5 7.00
9 8.00
Your program should display the total of the purchases after the user enters 0. Any other code should generate the “Invalid Code” error message.
Answer:
##############################################################################
# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 05/exercise-05-15.py.py
##############################################################################
to_pay = 0
while True:
code = int(input("Product code (0 to exit): "))
price = 0
if code == 0:
break
elif code == 1:
price = 0.50
elif code == 2:
price = 1.00
elif code == 3:
price = 4.00
elif code == 5:
price = 7.00
elif code == 9:
price = 8.00
else:
print("Invalid code!")
if price != 0:
quantity = int(input("Quantity: "))
to_pay = to_pay + (price * quantity)
print(f"Total to pay R${to_pay:8.2f}")