Stack Data Structure Visualizer - LIFO Operations

Stack Data Structure: how it works

A Stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle. Think of it like a stack of plates: you can only add or remove from the top.

1. Push (Insert)

   Adds an item to the top of the stack.

2. Pop (Remove)

   Removes the item from the top of the stack.

3. Peek / Top

   Returns the top element of the stack without removing it.

Complexity

Best-case time

O(1)

Average time

O(1)

Worst-case time

O(1)

Space

O(N)

All core stack operations (Push, Pop, Peek) happen at the top of the stack, which allows them to execute in constant O(1) time.