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A stack is a way of organizing data where items are added and removed from the same end, following a "last in, first out" principle—like a stack of plates where you take the top plate off first. This simple organizational method matters because it's useful for many computing tasks, such as undoing actions in software or managing how a computer processes nested instructions.
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Similarly to a stack of plates, adding or removing is only practical at the top. 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: