Boolean type behavior in Typescript - Mini Project: Build & Apply

Boolean type behavior

📖 Scenario: Imagine you are creating a simple system to check if a user is allowed to access a website feature based on their subscription status.

🎯 Goal: You will create a boolean variable to represent the subscription status, then use it to decide if the user can access the feature.

📋 What You'll Learn

Create a boolean variable named isSubscribed with the value true.

Create a boolean variable named hasTrial with the value false.

Create a boolean variable named canAccessFeature that is true if isSubscribed or hasTrial is true.

Print the value of canAccessFeature.

💡 Why This Matters

🌍 Real World

Boolean variables are used everywhere to represent yes/no, true/false, or on/off states in programs.

💼 Career

Understanding boolean logic is essential for controlling program flow and making decisions in software development.

1

Create subscription status variables

Create a boolean variable called isSubscribed and set it to true. Also create a boolean variable called hasTrial and set it to false.

Typescript

// Your code here
// Create boolean variables isSubscribed and hasTrial

Need a hint?

Use let to declare variables and assign true or false directly.

2

Create access control variable

Create a boolean variable called canAccessFeature that is true if either isSubscribed or hasTrial is true. Use the logical OR operator ||.

Typescript

let isSubscribed: boolean = true;
let hasTrial: boolean = false;

// Create canAccessFeature using isSubscribed or hasTrial
// Your code here

Need a hint?

Use || to combine two boolean variables.

3

Check access with if statement

Write an if statement that checks if canAccessFeature is true. Inside the if, create a variable message with the value 'Access granted'. Otherwise, set message to 'Access denied'.

Typescript

let isSubscribed: boolean = true;
let hasTrial: boolean = false;
let canAccessFeature: boolean = isSubscribed || hasTrial;

// Use if statement to set message based on canAccessFeature
// Your code here

Need a hint?

Use if (canAccessFeature) to check the boolean and assign message accordingly.

4

Print the access message

Write a console.log statement to print the value of the variable message.

Typescript

let isSubscribed: boolean = true;
let hasTrial: boolean = false;
let canAccessFeature: boolean = isSubscribed || hasTrial;

let message: string;
if (canAccessFeature) {
    message = 'Access granted';
} else {
    message = 'Access denied';
}

// Print the message
// Your code here

Need a hint?

Use console.log(message); to show the message in the console.