Donut Stack
Stack
A stack is a linear data structure that follows the Last In, First Out (LIFO) principle, meaning the last element added is the first one removed. It operates using two primary functions: push, which adds an element to the top, and pop, which removes the top element. Stacks are widely used in programming for tasks like function call management, expression evaluation, and backtracking algorithms. Other operations include peek (view the top element without removal) and isEmpty (check if the stack is empty). Implementations can use arrays or linked lists. Stacks are fundamental in computer science, aiding in parsing syntax, undo mechanisms, and memory management. Their simplicity and efficiency make them essential for various computational problems.
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