Calculator input methods: Difference between revisions

Revision as of 12:38, 4 May 2009

Revision as of 12:42, 4 May 2009

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{{main|Reverse Polish Notation}}

In Reverse Polish Notation also known as '''Postfix notation''' all operations are entered after the operands[[operand]]s on which the operation is performed. Reverse Polish Notation is parenthesis-free which usually leads to less button presses needed to perform a operation. By the use of [[Stack_(data_structure)|stack]] one can enter formulas without the need to rearrange operands.

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Note example 1 which is one of the few examples where Reverse Polish Notation does not use the fewest button presses - provided one does not rearrange operantsoperands. If one would do so then only 5 key strokes would be needed.

=== infix notation (without [[order of operations]]) ===

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From the first example one can see that it is necessary to rearrange operantsoperands in order to get the correct result.

=== infix notation (with [[order of operations]]) ===