Arithmetic operators in Python - Mini Project: Build & Apply

Arithmetic Operators Practice

📖 Scenario: You are helping a small shop owner calculate prices and discounts for items sold.

🎯 Goal: Build a simple program that uses arithmetic operators to calculate the total price, discount amount, and final price after discount.

📋 What You'll Learn

Create variables for item price and quantity

Create a variable for discount rate

Calculate total price using multiplication

Calculate discount amount using multiplication

Calculate final price by subtracting discount from total price

Print the final price

💡 Why This Matters

🌍 Real World

Calculating prices and discounts is common in shopping and billing systems.

💼 Career

Understanding arithmetic operators is essential for programming tasks involving calculations, finance, and data processing.

1

Create item price and quantity variables

Create a variable called item_price and set it to 20. Create another variable called quantity and set it to 3.

Python

# Create variables item_price and quantity with values 20 and 3
# Your code here

Need a hint?

Use the assignment operator = to set values.

2

Create discount rate variable

Create a variable called discount_rate and set it to 0.1 (which means 10%).

Python

item_price = 20
quantity = 3
# Create variable discount_rate with value 0.1
# Your code here

Need a hint?

Remember that 10% as a decimal is 0.1.

3

Calculate total price, discount amount, and final price

Calculate the total price by multiplying item_price and quantity and store it in total_price. Calculate the discount amount by multiplying total_price and discount_rate and store it in discount_amount. Calculate the final price by subtracting discount_amount from total_price and store it in final_price.

Python

item_price = 20
quantity = 3
discount_rate = 0.1
# Calculate total_price, discount_amount, and final_price
# Your code here

Need a hint?

Use * for multiplication and - for subtraction.

4

Print the final price

Write a print statement to display the value of final_price.

Python

item_price = 20
quantity = 3
discount_rate = 0.1
total_price = item_price * quantity
discount_amount = total_price * discount_rate
final_price = total_price - discount_amount
# Print the final_price
# Your code here

Need a hint?

Use print(final_price) to show the result.