What is stack meaning?

A stack is a basic data structure in computer science that stores and manages data in a specific way. It is a type of collection that follows a last-in, first-out (LIFO) order, which means that the last element added to the stack is the first one to be removed.

A stack has two primary operations: push and pop. Push adds an item to the top of the stack, while pop removes an item from the top of the stack. Other operations that can be performed on a stack include peek (viewing the top element without removing it) and isEmpty (checking whether the stack is empty).

Stacks are used in many applications, including compilers, operating systems, and web browsers, and are an important concept in computer science. They are often implemented using arrays or linked lists.