Stack using Link List Part 1 | Stack and Queue | Data Structure Using C

TL;DR

Learn how to create a stack data structure using a linked list, which is a last in first out (LIFO) data structure.

Transcript

hello dear students in this video we will be learning how to create a stack using linked list stack as the data structure it is also called as last in first out data structure basically stack is meant for storing data if somebody asks you what is stack you simply tell stack stores data finished stack stores data but stack stores data in last in fir... Read More

Key Insights

• ❓ Stack data structures follow a last in first out (LIFO) principle.
• 💌 Stacks are commonly used in computer science and real-life scenarios like organizing SMS messages or emails.
• 👂 Creating a stack using a linked list involves storing data in nodes with a pointer to the next node.
• 😥 The "top" pointer always points to the most recently inserted node in the stack.
• 🎮 Stack implementation using an array will be covered in later videos.
• 👂 Understanding linked lists is crucial for creating a stack using a linked list.
• ❓ The topmost node is the first to be removed from the stack.

Questions & Answers

Q: What is a stack and how does it store data?

A stack is a data structure that stores data in a last in first out manner. The most recently added item is stored at the top of the stack and is the first to be removed.

Q: How is a stack represented using a linked list?

In a singly linked list, each node stores data and has a pointer to the next node. The top of the stack is represented by a special pointer called "top" or "header pointer" which points to the most recently inserted node.

Q: What happens when a new item is added to the stack?

When a new item is added to the stack, it becomes the topmost node and the "top" pointer is updated to point to it. The next pointer of the new node points to the previous topmost node.

Q: How can a stack be created using an array instead of a linked list?

While stacks can also be created using arrays, this video series focuses on implementing stacks using linked lists.

Summary & Key Takeaways

• A stack is a data structure that stores data in a last in first out manner, with the most recently added item being the first to be removed.

• Stack data structures are commonly used in computer science and real-life scenarios, such as organizing SMS messages or emails.

• One way to create a stack is by using a linked list, where each node stores data and points to the next node.