Stack (data structure) in the context of Collection (abstract data type)

⭐ Core Definition: Stack (data structure)

In computer science, a stack is an abstract data type that serves as a collection of elements with two main operations:

Push, which adds an element to the collection, and
Pop, which removes the most recently added element.

Additionally, a peek operation can, without modifying the stack, return the value of the last element added (the item at the top of the stack). The name stack is an analogy to a set of physical items stacked one atop another, such as a stack of plates.

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Stack (data structure) in the context of Postfix notation

Reverse Polish notation (RPN), also known as reverse Łukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands, in contrast to prefix or Polish notation (PN), in which operators precede their operands. The notation does not need any parentheses for as long as each operator has a fixed number of operands.

The term postfix notation describes the general scheme in mathematics and computer sciences, whereas the term reverse Polish notation typically refers specifically to the method used to enter calculations into hardware or software calculators, which often have additional side effects and implications depending on the actual implementation involving a stack. The description "Polish" refers to the nationality of logician Jan Łukasiewicz, who invented Polish notation in 1924.

View the full Wikipedia page for Postfix notation

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Stack (data structure) in the context of Reverse Polish notation

Reverse Polish notation (RPN), also known as reverse Łukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands, in contrast to prefix or Polish notation (PN), in which operators precede their operands. The notation does not need any parentheses as long as each operator has a fixed number of operands.

The term postfix notation describes the general scheme in mathematics and computer sciences, whereas the term reverse Polish notation typically refers specifically to the method used to enter calculations into hardware or software calculators, which often have additional side effects and implications depending on the actual implementation involving a stack. The description "Polish" refers to the nationality of logician Jan Łukasiewicz, who invented Polish notation in 1924.

View the full Wikipedia page for Reverse Polish notation

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Stack (data structure) in the context of Collection (abstract data type)

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⭐ Core Definition: Stack (data structure)

Stack (data structure) in the context of Postfix notation

Stack (data structure) in the context of Reverse Polish notation