Web Reference: Sep 13, 2025 · A stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle. It can be implemented using a linked list, where each element of the stack is represented as a node. A stack is a useful data structure in programming. It is just like a pile of plates kept on top of each other. In this tutorial, you will understand the working of Stack and it's implementations in Python, Java, C, and C++. The Stack class represents a last-in-first-out (LIFO) stack of objects. It extends class Vector with five operations that allow a vector to be treated as a stack. The usual push and pop operations are provided, as well as a method to peek at the top item on the stack, a method to test for whether the stack is empty, and a method to search the stack for an item and discover how far it is from ...
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