Implementation of Stack Using Linked List

Stack: A stack is a linear data structure that follows the Last In, First Out (LIFO) principle. The element added last is accessed first.

Linked List: A linked list is a dynamic data structure where elements (nodes) are linked using pointers. Each node contains data and a reference to the next node.

Stack Using Linked List: A stack can be implemented using a linked list where each node represents an element of the stack. The top of the stack is represented by the head of the linked list.

How does it work?

• Push Operation: Add a new node at the beginning of the linked list. Update the head pointer to the new node.
• Pop Operation: Remove the node at the beginning of the linked list. Update the head pointer to the next node.
• Peek Operation: Access the data of the node at the head without removing it.

Advantages:

• Dynamic size: No need to define the size of the stack in advance.
• Efficient memory usage: Memory is allocated only when needed.

Disadvantages:

• Extra memory is required for pointers in each node.
• Operations may be slower compared to array-based implementation due to pointer manipulation.

Key Characteristics:

• Follows LIFO principle.
• Efficient for dynamic stack operations.
• Can handle overflow and underflow conditions gracefully.

Time Complexity:

• Push: O(1)
• Pop: O(1)
• Peek: O(1)