Stack in Data Structures 👋 Introduction In the world of computer science, a Stack is one of the simplest and most useful data structures. It follows the LIFO principle — Last In, First Out , which means the last element added is the first one to be removed . Think of a stack of plates in a kitchen — you can only take the top plate off first. That’s exactly how a stack works in programming! ⚙️ How Stack Works A stack stores elements in a linear order , but data can only be inserted or removed from one end , called the top . Main operations in Stack: Push: Add an element to the top. Pop: Remove the top element. Peek (Top): View the top element without removing it. isEmpty: Check if the stack is empty. Visual Example : Initial Stack: [ ] Push(10) → [10] Push(20) → [10, 20] Push(30) → [10, 20, 30] Pop() → removes 30 → [10, 20] Diagram : 💻 Implementation Example Show a short code snippet — e.g., in Python or C++. Python Example : stack = [...