RPN Scientific Calculator
what is Reverse Polish notation
Reverse Polish notation (RPN) is a way of writing mathematical expressions in which the operators follow the operands. In other words, in RPN, the expression is evaluated from left to right, with the operators acting on the operands that immediately precede them.
For example, the expression "3 + 4" can be written in RPN as "3 4 +". To evaluate this expression in RPN, you would push the numbers 3 and 4 onto a stack, then apply the addition operator + to those numbers, which would yield the result 7.
RPN is often used in calculators and programming languages because it eliminates the need for parentheses and operator precedence rules. RPN expressions can also be evaluated efficiently using a stack-based algorithm, which makes them well-suited for use in computer programs.
