Numeric values (int and float behavior) in Python - Mini Project: Build & Apply

Understanding Numeric Values: int and float behavior

📖 Scenario: You are helping a small shop owner calculate prices and discounts. The shop owner needs to understand how whole numbers and decimal numbers work in Python to avoid mistakes in billing.

🎯 Goal: Build a simple Python program that uses integer and float numbers to calculate total price and apply a discount.

📋 What You'll Learn

Create variables with integer and float values

Use a variable to store a discount rate as a float

Calculate the discounted price using numeric operations

Print the final discounted price

💡 Why This Matters

🌍 Real World

Shops and businesses often need to calculate prices with discounts and taxes. Understanding how numbers work helps avoid billing mistakes.

💼 Career

Many programming jobs require handling money and prices correctly, so knowing how integers and floats behave is important.

1

Create initial numeric variables

Create a variable called price and set it to the integer value 100. Create another variable called tax and set it to the float value 7.5.

Python

# Create variables price and tax with values 100 and 7.5
# Your code here

Need a hint?

Remember, integers are whole numbers like 100, and floats are decimal numbers like 7.5.

2

Add a discount rate as a float

Create a variable called discount_rate and set it to the float value 0.1 to represent a 10% discount.

Python

price = 100
tax = 7.5
# Create a variable discount_rate with value 0.1
# Your code here

Need a hint?

Use a decimal number between 0 and 1 to represent the discount rate.

3

Calculate the discounted price

Create a variable called discounted_price that calculates the price after applying the discount rate. Use the formula: price - (price * discount_rate).

Python

price = 100
tax = 7.5
discount_rate = 0.1
# Calculate discounted_price using price and discount_rate
# Your code here

Need a hint?

Multiply price by discount_rate, then subtract from price.

4

Print the discounted price

Write a print statement to display the value of discounted_price.

Python

price = 100
tax = 7.5
discount_rate = 0.1
discounted_price = price - (price * discount_rate)
# Print the discounted_price
# Your code here

Need a hint?

Use print(discounted_price) to show the result.