Tuple with fixed length and types in Typescript - Mini Project: Build & Apply

Tuple with fixed length and types

📖 Scenario: You are creating a simple program to store information about a book using a tuple. Each book has a fixed set of details: title, number of pages, and whether it is a bestseller.

🎯 Goal: Build a TypeScript tuple with fixed length and types to hold book information, then access and display the data.

📋 What You'll Learn

Create a tuple with exactly three elements: a string, a number, and a boolean

Use a variable named book to store the tuple

Create a variable named isBestseller to hold the boolean value from the tuple

Print the book title and bestseller status using console.log

💡 Why This Matters

🌍 Real World

Tuples are useful when you want to group a fixed number of related values with different types, like storing a book's details or coordinates.

💼 Career

Understanding tuples helps in writing clear and type-safe code, which is important for software development jobs using TypeScript or similar languages.

1

Create a tuple with fixed length and types

Create a tuple called book with these exact values and types: "The Alchemist" (string), 208 (number), and true (boolean).

Typescript

# Create the tuple 'book' with the specified values and types
// Your code here

Need a hint?

Use square brackets to define the tuple type and assign the values in the same order.

2

Extract the bestseller status from the tuple

Create a variable called isBestseller and assign it the third element of the book tuple.

Typescript

const book: [string, number, boolean] = ["The Alchemist", 208, true];
// Assign the third element of 'book' to 'isBestseller'
// Your code here

Need a hint?

Remember tuple elements are accessed by their index starting at 0.

3

Access and print the book title and bestseller status

Use console.log to print the book title from book[0] and the isBestseller variable in this exact format: "Title: The Alchemist, Bestseller: true".

Typescript

const book: [string, number, boolean] = ["The Alchemist", 208, true];
const isBestseller: boolean = book[2];
// Print the title and bestseller status in the specified format
// Your code here

Need a hint?

Use a template string (backticks) to insert variables inside the string.

4

Display the final output

Run the program to display the output showing the book title and bestseller status exactly as: Title: The Alchemist, Bestseller: true.

Typescript

const book: [string, number, boolean] = ["The Alchemist", 208, true];
const isBestseller: boolean = book[2];
console.log(`Title: ${book[0]}, Bestseller: ${isBestseller}`);
// Run the program to see the output

Need a hint?

Make sure your console.log prints exactly as shown.