A stack is a conceptual structure consisting of a set of homogeneous elements and is based on the principle of last in first out (LIFO). It is a commonly used abstract data type with two major operations, namely push and pop. Push and pop are carried out on the topmost element, which is the item most recently added to the stack. The push operation adds an element to the stack while the pop operation removes an element from the top position. The stack concept is used in programming and memory organization in computers.

A stack represents a sequence of objects or elements in a linear data structure format. The stack consists of a bounded bottom and all the operations are carried out on the top position. Whenever an element is added to the stack by the push operation, the top value is incremented by one, and when an element is popped out from the stack, the top value is decremented by one. A pointer to the top position of the stack is also known as the stack pointer.

A stack may be fixed in size or may have dynamic implementation where the size is allowed to change. In the case of bounded capacity stacks, trying to add an element to an already full stack causes a stack overflow exception. Similarly, a condition where a pop operation tries to remove an element from an already empty stack is known as underflow.

Stacks. A stack is a container of objects that are inserted and removed according to the last-in first-out (LIFO) principle. ... A stack is a limited access data structure elements can be added and removed from the stack only at the top. push adds an item to the top of the stack, pop removes the item from the top.

Examples: letter basket, stack of trays, stack of plates. The only element of a stack that may be accessed is the one that was most recently inserted. There are only two basic operations on stacks, the push (insert), and the pop (read and delete). The operation push(x) places the item x onto the top of the stack.

Stack pointer holds the address of the last accupied memory location of the stack called stack pointer. It is used to save the contents of register if it is required during the execution of a program. It indicates which memory location onward the stack is vacent for further storage

A stack is a basic data structure that can be logically thought of as a linear structure represented by a real physical stack or pile, a structure where insertion and deletion of items takes place at one end called top of the stack. ... This structure is used all throughout programming.

A stack is an Abstract Data Type (ADT), commonly used in most programming languages. ... Likewise, Stack ADT allows all data operations at one end only. At any given time, we can only access the top element of a stack. This feature makes it LIFO data structure. LIFO stands for Last-in-first-out.

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