Push Operation on Stack in DSA Python - Build from Scratch

Push Operation on Stack

📖 Scenario: Imagine you have a stack of books. You want to add a new book on top of the stack. This is called the push operation in stacks.

🎯 Goal: You will create a stack using a list, set a new book to add, push it onto the stack, and then print the stack to see the new book on top.

📋 What You'll Learn

Create a list called stack with these exact books: 'Math', 'Science', 'History'

Create a variable called new_book and set it to 'English'

Use the append() method on stack to push new_book onto the stack

Print the stack list to show the books after pushing

💡 Why This Matters

🌍 Real World

Stacks are used in many places like undo features in apps, browser history, and managing tasks in order.

💼 Career

Understanding stack operations is important for software development, especially in areas like parsing, memory management, and algorithm design.

1

Create the initial stack

Create a list called stack with these exact books: 'Math', 'Science', 'History'

DSA Python

# Create the stack list with the books
# Your code here

Hint

Use square brackets [] to create a list and separate items with commas.

2

Set the new book to push

Create a variable called new_book and set it to the string 'English'

DSA Python

stack = ['Math', 'Science', 'History']
# Create the variable new_book with value 'English'
# Your code here

Hint

Use the equals sign = to assign the string 'English' to new_book.

3

Push the new book onto the stack

Use the append() method on the list stack to add the new_book on top

DSA Python

stack = ['Math', 'Science', 'History']
new_book = 'English'
# Push new_book onto stack using append()
# Your code here

Hint

Call stack.append(new_book) to add the new book to the end of the list.

4

Print the stack after push

Print the list stack to show the books after pushing the new book

DSA Python

stack = ['Math', 'Science', 'History']
new_book = 'English'
stack.append(new_book)
# Print the stack list
# Your code here

Hint

Use print(stack) to display the current stack.