Switch-case statements in MATLAB - Mini Project: Build & Apply

Using Switch-Case Statements in MATLAB

📖 Scenario: You are creating a simple program that helps a coffee shop decide the price of a drink based on the size selected by the customer.

🎯 Goal: Build a MATLAB program that uses a switch-case statement to assign prices to different coffee sizes.

📋 What You'll Learn

Create a variable called size with a specific coffee size value.

Create a variable called price to store the price of the coffee.

Use a switch statement on the size variable with cases for 'small', 'medium', and 'large'.

Assign the correct price for each size: 2.5 for small, 3.5 for medium, and 4.5 for large.

Add a otherwise case that assigns 0 to price if the size is not recognized.

Print the price using fprintf with the format: 'The price is $X.XX\n'.

💡 Why This Matters

🌍 Real World

Coffee shops and many businesses use switch-case logic to decide prices or actions based on customer choices.

💼 Career

Understanding switch-case statements is important for writing clear and efficient decision-making code in many programming jobs.

1

Create the coffee size variable

Create a variable called size and set it to the string 'medium'.

MATLAB

% Create the variable size and set it to 'medium'
% Your code here

Need a hint?

Use single quotes for strings in MATLAB, like 'medium'.

2

Create the price variable

Create a variable called price and set it to 0 as a starting value.

MATLAB

size = 'medium';
% Create the variable price and set it to 0
% Your code here

Need a hint?

Initialize price to zero before the switch-case.

3

Use switch-case to assign price

Write a switch statement on the variable size with cases for 'small', 'medium', and 'large'. Assign price = 2.5 for 'small', price = 3.5 for 'medium', and price = 4.5 for 'large'. Add an otherwise case that sets price = 0.

MATLAB

size = 'medium';
price = 0;
% Write the switch-case statement to set price based on size
% Your code here

Need a hint?

Remember to end the switch statement with end.

4

Print the price

Use fprintf to print the price in the format: 'The price is $X.XX\n', where X.XX is the value of price.

MATLAB

size = 'medium';
price = 0;
switch size
    case 'small'
        price = 2.5;
    case 'medium'
        price = 3.5;
    case 'large'
        price = 4.5;
    otherwise
        price = 0;
end
% Print the price using fprintf
% Your code here

Need a hint?

Use %.2f in fprintf to format the price with two decimal places.