Array iteration and enumerated in Swift - Mini Project: Build & Apply

Array iteration and enumerated

📖 Scenario: You are helping a small bookstore keep track of book titles and their positions on a shelf.

🎯 Goal: You will create an array of book titles, then use enumerated() to print each book's position and title.

📋 What You'll Learn

Create an array called books with exactly these titles: "Swift Basics", "iOS Development", "Data Structures"

Create a variable called startIndex and set it to 1

Use a for loop with enumerated() on books to get index and title

Print the position starting from startIndex and the book title in the format: "Book 1: Swift Basics"

💡 Why This Matters

🌍 Real World

Bookstores or libraries often need to list items with their positions or numbers for easy reference.

💼 Career

Knowing how to loop through arrays with indexes is important for many programming tasks like displaying lists, processing data, or creating menus.

1

Create the books array

Create an array called books with these exact titles in order: "Swift Basics", "iOS Development", "Data Structures"

Swift

# Create the array books with the given titles
# Your code here

Need a hint?

Use square brackets [] to create an array and separate titles with commas.

2

Set the start index

Create a variable called startIndex and set it to 1

Swift

let books = ["Swift Basics", "iOS Development", "Data Structures"]
# Create startIndex variable and set it to 1
# Your code here

Need a hint?

Use let to create a constant variable named startIndex.

3

Loop with enumerated()

Use a for loop with enumerated() on books to get index and title

Swift

let books = ["Swift Basics", "iOS Development", "Data Structures"]
let startIndex = 1
# Use for loop with enumerated() to get index and title
# Your code here

Need a hint?

Use for (index, title) in books.enumerated() to get both position and value.

4

Print book positions and titles

Inside the loop, print the position starting from startIndex plus index and the book title in this exact format: "Book 1: Swift Basics"

Swift

let books = ["Swift Basics", "iOS Development", "Data Structures"]
let startIndex = 1
for (index, title) in books.enumerated() {
    # Print the book position and title here
    # Your code here
}

Need a hint?

Use print("Book \(startIndex + index): \(title)") inside the loop.