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 the more common infix notation (in which operators are placed between operands), as well as prefix notation (in which operators precede their operands). The notation does not need any parentheses as long as each operator has a fixed number of operands.
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 the more common infix notation (in which operators are placed between operands), as well as prefix notation (in which operators precede their operands). The notation does not need any parentheses as long as each operator has a fixed number of operands.
Source: Wikipedia "Reverse Polish notation" · CC BY-SA 4.0
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