Stacks use a lastin, first-out (LIFO) principle from "summary" of Data Structures and Algorithms in Python by Michael T. Goodrich,Roberto Tamassia,Michael H. Goldwasser
Stacks use a last-in, first-out (LIFO) principle, which means that the most recently added element is the first one to be removed. This concept is simple yet powerful, as it allows for efficient and intuitive data manipulation. When you add an element to a stack, it is placed on top of the existing elements. This makes the newly added element easily accessible, as it is the first one to be removed when you perform a pop operation on the stack. In this way, stacks are well-suited for keeping track of the order in which elements were added. The LIFO principle of stacks can be likened to a stack of plates in a cafeteria. When you add a new plate to the stack, you place it on top of the existing plates. Similarly, when you remove a plate, you take the one from the top of the stack. This ensures that the most recently added plate is the first one to be used. The simplicity of the LIFO principle makes stacks easy to understand and use in various applications. Whether you are implementing a stack data structure in code or using a stack to keep track of function calls in a program, the LIFO principle ensures that elements are managed in a predictable and efficient manner. In summary, the last-in, first-out (LIFO) principle of stacks is a fundamental concept that underlies their functionality. By adhering to this principle, stacks enable simple and efficient data manipulation, making them a valuable tool in computer science and programming.
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