Stack using Link List Part 3 | Stack and Queue | Data Structure Using C

TL;DR

Learn how to create and implement a stack using linked lists, understanding the push and pop operations.

Transcript

hello dear students in this video we will be learning how to create a stack using linked list in the previous video we saw how to declare a node data structure a node which actually is collection of integer data and pointer called next which points to another node and also we declared a structure called stack which contains only one member which is... Read More

Key Insights

• 👂 The stack data structure is implemented using linked lists, which consist of nodes containing data and pointers to the next node.
• 👶 The push operation adds a new value to the stack by creating a new node and updating the "top" pointer to point to it.
• 😥 The pop operation removes the top node from the stack and updates the "top" pointer to point to the previous node.
• 😫 Initializing the stack involves declaring a stack variable and setting its "top" pointer to null.
• 🫷 The stack follows the Last-In-First-Out (LIFO) principle, meaning the last value pushed into the stack is the first one to be removed.
• 👻 The stack implementation using linked lists allows for dynamic and efficient memory allocation.
• 💦 Understanding the importance of the node and stack structures is crucial in implementing and working with stacks.

Questions & Answers

Q: What is the purpose of the node structure in the stack?

The node structure is essential in the stack as it is the building block that stores integer data along with a pointer, allowing the creation of a linked list-based stack.

Q: How are values pushed into the stack using linked lists?

When pushing a new value into the stack, a new node is created with a pointer to the previous top node, forming a linked list connection.

Q: Why is the "top" pointer initially set to null?

When the stack is empty, the "top" pointer is set to null to indicate that there are no nodes in the stack.

Q: What happens when values are popped from the stack?

When values are popped from the stack, the top node is removed, and the "top" pointer is updated to point to the previous node in the linked list.

Summary & Key Takeaways

• This video introduces the concept of creating a stack using linked lists.

• The stack data structure consists of nodes that store integer data and a pointer called "next".

• The two major operations on the stack are push (adding data) and pop (removing data) which follow the Last-In-First-Out (LIFO) principle.