Pop Operation on Stack in DSA Python - Build from Scratch

Pop Operation on Stack

📖 Scenario: Imagine you have a stack of books. You can only take the top book off the stack at a time. This is how a stack data structure works in computers.

🎯 Goal: You will create a stack using a list, set up a variable to hold the stack size, perform a pop operation to remove the top item, and then print the stack after the pop.

📋 What You'll Learn

Create a list called stack with these exact elements in order: 10, 20, 30, 40, 50

Create a variable called stack_size that holds the length of the stack

Use the pop() method on stack to remove the top element

Print the stack after the pop operation

💡 Why This Matters

🌍 Real World

Stacks are used in many real-world applications like undo features in text editors, browser history, and managing function calls in programming.

💼 Career

Understanding stack operations is important for software developers, especially when working with algorithms, memory management, and system design.

1

Create the stack list

Create a list called stack with these exact elements in order: 10, 20, 30, 40, 50

DSA Python

# Create the stack list with the elements 10, 20, 30, 40, 50
# Your code here

Hint

Use square brackets to create a list and separate the numbers with commas.

2

Set the stack size variable

Create a variable called stack_size that holds the length of the stack list using the len() function

DSA Python

stack = [10, 20, 30, 40, 50]
# Create stack_size to hold the length of stack
# Your code here

Hint

Use len(stack) to get the number of items in the list.

3

Pop the top element from the stack

Use the pop() method on the stack list to remove the top element

DSA Python

stack = [10, 20, 30, 40, 50]
stack_size = len(stack)
# Remove the top element from stack using pop()
# Your code here

Hint

Call pop() on the list to remove the last item.

4

Print the stack after pop

Print the stack list after the pop operation to show its current state

DSA Python

stack = [10, 20, 30, 40, 50]
stack_size = len(stack)
stack.pop()
# Print the stack list
# Your code here

Hint

Use print(stack) to display the list.