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CMPT 1011: Introduction to Computing
Lab Assignment 2: Variables, mathematical operations and data types
Value
This coding challenge is worth 3% of your final grade.
Background
In this coding challenge you will be using variables to calculate and print the correct output.
This assignment relates to the following General Learning Outcomes:
1. Explain fundamental concepts in computing science
2. Examine different data types and manipulating variables
Instructions
1. Use Intellij Idea write your code and make sure it works for couple of examples.
Problem statement: Shopping calculator
A shopkeeper sells apples at 3$/unit, bananas at 1.8$/unit and oranges at 2.5$/unit. He usually sells 20 apples, 50 bananas and 35 oranges per day. However, due to extreme snowy conditions, he’s offering special discounts:
• Apples: 10% off,
• Bananas: 15% off clearance sale,
• Oranges: 10 for 22$.
Now, a customer arrives on a snowy day and wants to buy X apples, Y oranges and Z bananas.

Your task is to calculate and print the following:
1. Revenue from the Customer:
• Ask for the number of apples (X), oranges (Y) and bananas (Z) bought. For example: “How many oranges? ” and “How many bananas? ” • Calculate the total cost for the customer, factoring in all discounts.
Assignment 5
• Print: “The shopkeeper sold X apples, Y oranges and Z bananas to the customer for a total of $.” Where is your total calculated price.
2. Usual daily revenue:
• Calculate and print the shopkeeper’s usual daily revenue based on the standard pricing.
• Print: “Usually, the shopkeeper makes ‘$’.” Where ‘$’ should have your calculated total revenue for X apples, Y bananas and Z oranges.
Suggestions:
• You are to solve the problem by declaring variables containing each fruit unit price. For example, apples_price = 3, bananas_price = 1.8 etc. You will also have different variable storing each fruits’ discounted price for snowy days, e.g. discounted_apples_price = 0.9* apples_price.
• When asking for user inputs, use descriptive variable names and correct casting to type as needed. For example:
num_apples = float(input(“How many apples? “))
• Use clear variable names when calculating total revenue for the customer and the usual daily revenue. For example, total_customer_revenue, total_usual_revenue etc.
• In print statements, practice concatenating variable values using f-strings, the “+” or “,” operator. Example of f-strings:
print(f”The shopkeeper sold {num_apples} apples, {num_oranges} oranges and {num_bananas} bananas to the customer for a total of ${total_customer_revenue}.”)
2. Submit your “__Lab2.py” file to the Moodle assignment box.
3. Deadlines will be announced in Moodle. Consider this assignment your opportunity to integrate what you’ve learned throughout the course.
4. You will be assessed using the rubric provided.
Assignment 2
Assignment Rubric (Total: __/12 marks)
5 3 2 1 Does Not
Meet
Expectations 0
Print statements and input function usage All the print statements are correctly showing the values and input function used properly 1 or few print statements missing. 1 or few inputs not taken. A few messages not displayed, and input function not correctly used. Both print statements and input function not used correctly. No evidence
Variable naming and Type casting All variable names
sensible and correctly casted to types as required Some
variable names
sensible and correctly casted to types as required Variable names are not
clear Variable names not clear and type casting not done correctly No evidence
Filename and documentation Good documentation in code and correct filename Either documentation or filename not correct No evidence

Assignment 2