Polish notation


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Related to Polish notation: reverse Polish notation

Polish notation

[′pō·lish nō′tā·shən]
(computer science)
A notation system for digital-computer or calculator logic in which there are no parenthetical expressions and each operator is a binary or unary operator in the sense that it operates on not more than two operands. Also known as Lukasiewicz notation; parenthesis-free notation.
The version of this notation in which operators precede the operands with which they are associated. Also known as prefix notation.

Polish notation

A method for expressing a sequence of calculations developed by the Polish logician Jan Lukasiewicz in 1929. For example, A(B+C) would be expressed as
* A + B C. In reverse Polish notation, it would be A B C + *.