Web Reference: What is a Stack? A stack is a linear data structure where elements are stored in the LIFO (Last In First Out) principle where the last element inserted would be the first element to be deleted. A stack is an Abstract Data Type (ADT), that is popularly used in most programming languages. From the ADT perspective a program can use a stack independently of the stack’s implementation. Now let us describe in a little more in detail four important operations associated with the stack. Simple representation of a stack runtime with push and pop operations. In computer science, a stack is an abstract data type that serves as a collection of elements with two main operations: Pop, which removes the most recently added element.
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