Module · Stacks

LIFO Stack Visualizer

Last-In, First-Out — elements are added and removed from the top only.

↑ TOP

30
20
10
—
—
—

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.