Visualize
Stack
Push and pop values — visualize last-in-first-out in action.
Module · Stacks
LIFO Stack Visualizer
Last-In, First-Out — elements are added and removed from the top only.
↑ TOP
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BOTTOM
Size: 3/6
Stack initialized. Top is the rightmost element (LIFO).
Operation History
- #1Stack initialized. Top is the rightmost element (LIFO).
Time Complexity
Push
- Average
- O(1)
- Space
- O(1)
Pop
- Average
- O(1)
- Space
- O(1)
Peek
- Average
- O(1)
- Space
- O(n)
How It Works
A stack follows LIFO — Last-In, First-Out. The most recently pushed element is always the first one removed.
Stacks power undo systems, browser history, and recursive call stacks. All core operations run in constant time.