Stack (Data Structure)
A stack is a linear data structure that follows the Last In, First Out principle, where elements are added and removed from the top.
April 9, 2026·2 daqiiqaa dubbisuu·Abenezer Regasa
Stack (Data Structure)
A stack is a linear data structure that follows the Last In, First Out principle.
This means the last element added is the first one to be removed.
Think of it like a stack of plates.
You place a plate on top, and you also remove from the top.
Basic operations:
- Push: add an element to the top
- Pop: remove the top element
- Peek: view the top element without removing it
Where stacks are used:
- Function calls (call stack)
- Undo and redo operations
- Expression evaluation
- Backtracking algorithms
It is a simple concept, but very powerful in real-world applications.
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