Length and iteration methods in Python - Mini Project: Build & Apply

Length and Iteration Methods

📖 Scenario: Imagine you are building a small program to manage a list of books in a digital library. You want to store book titles, count how many books there are, and display each book title one by one.

🎯 Goal: You will create a list of book titles, calculate the total number of books using len(), iterate through the list using a for loop, and print both the titles and the total count.

📋 What You'll Learn

Create a list called books with the given titles

Use the len() function to count the number of books

Use a for loop to iterate through the list

Print each book title and the total number of books

💡 Why This Matters

🌍 Real World

Managing lists of items, like books, products, or tasks, is common in many jobs and daily life.

💼 Career

Understanding how to count and loop through lists is a basic skill for programming jobs, data handling, and automation.

1

Create the list of books

Create a list called books with these exact titles: 'Python Basics', 'Data Science', 'Machine Learning', 'Deep Learning'

Python

# Create the list called books with the given titles
# Your code here

Need a hint?

Use square brackets [] to create a list and separate each book title with commas.

2

Count the total books

Create a variable called total_books and set it to the length of the books list using the len() function

Python

books = ['Python Basics', 'Data Science', 'Machine Learning', 'Deep Learning']
# Create total_books using len(books)
# Your code here

Need a hint?

Use len(books) to find how many items are in the list.

3

Print each book title

Use a for loop with the variable book to iterate over the books list and print each book

Python

books = ['Python Basics', 'Data Science', 'Machine Learning', 'Deep Learning']
total_books = len(books)
# Use a for loop to print each book
# Your code here

Need a hint?

Use for book in books: to loop through each book and print it inside the loop.

4

Print the total number of books

Print the value of the variable total_books to show how many books are in the list

Python

books = ['Python Basics', 'Data Science', 'Machine Learning', 'Deep Learning']
total_books = len(books)
for book in books:
    print(book)
# Print total_books
# Your code here

Need a hint?

Use print(total_books) after the loop to show the total count.