himanshu1295 / python2

Functions, loops and data structures

Lab Instructions: Functions, loops and data structures

In this lab you will be presented with a menu ordering system which will allow users to
input three choices for a select menu. You are tasked with completing the menu system so
that it returns and calculates the final bill for the user.

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• Alternatively, you can follow lab instructions which use python3 commands to run your code in terminal.

There are three main objectives of this activity:

1. Create new functions to solve specific problems.
2. Gain experience of using for loops to iterate over different data collections.
3. Create and use data structures to store, retrieve and loop over data.

Exercise Instructions

1. Open the script ordering_system.py present inside the project folder.

2. Run the script and, when requested, enter in the three products of your choice based on the menu - 1 = espresso, 2 = coffee etc.

3. To run the script, open terminal and execute the following command.

   python3 ordering_system.py
   

4. Extend the script to have a new function called calculate_subtotal.
   It should accept one argument which is the order list and return the sum
   of the prices of the items in the order list.

5. Implement calculate_tax() which calculates the tax of the subtotal.
   The tax percentage is 15% of overall bill.

6. Implement summarize_order() which returns a list of the names of the items
   that the customer ordered and the total amount (including tax) that they have to pay.
   The orders should show the name and price.