Operator precedence in MATLAB - Mini Project: Build & Apply

Operator precedence

📖 Scenario: Imagine you are calculating the total cost of items in a shopping cart with discounts and taxes applied. The order in which you perform these calculations matters to get the correct final price.

🎯 Goal: You will write MATLAB code to calculate the final price of an item by applying discounts and taxes, demonstrating how operator precedence affects the result.

📋 What You'll Learn

Create variables with exact values for price, discount rate, and tax rate

Create a variable for the discounted price using correct operator precedence

Calculate the final price by adding tax to the discounted price

Display the final price using disp

💡 Why This Matters

🌍 Real World

Calculating prices with discounts and taxes is common in shopping apps and billing systems.

💼 Career

Understanding operator precedence helps avoid bugs in financial calculations and data processing tasks.

1

Create initial variables

Create a variable called price and set it to 100. Create a variable called discount and set it to 0.2 (which means 20%). Create a variable called tax and set it to 0.1 (which means 10%).

MATLAB

% Your code here

Need a hint?

Use the assignment operator = to set the variables.

2

Calculate discounted price

Create a variable called discounted_price that calculates the price after discount by subtracting price * discount from price. Use parentheses to ensure the multiplication happens before subtraction.

MATLAB

price = 100;
discount = 0.2;
tax = 0.1;
% Your code here

Need a hint?

Remember multiplication has higher precedence than subtraction, but use parentheses to be clear.

3

Calculate final price with tax

Create a variable called final_price that adds tax to the discounted_price. Multiply discounted_price by tax and add it to discounted_price. Use parentheses to ensure multiplication happens before addition.

MATLAB

price = 100;
discount = 0.2;
tax = 0.1;
discounted_price = price - (price * discount);
% Your code here

Need a hint?

Use parentheses to make sure the multiplication happens before the addition.

4

Display the final price

Use disp to display the value of final_price.

MATLAB

price = 100;
discount = 0.2;
tax = 0.1;
discounted_price = price - (price * discount);
final_price = discounted_price + (discounted_price * tax);
% Your code here

Need a hint?

Use disp(final_price) to show the result.