ReversePolish
ReversePolish, commonly referred to as Reverse Polish notation (RPN) or postfix notation, is a mathematical notation in which operators follow their operands rather than appear between them. This ordering allows expressions to be evaluated by a stack machine, often without requiring parentheses.
The concept originated with the Polish logician Jan Łukasiewicz in the 1920s as part of his work
Evaluation of an RPN expression uses a stack. To compute, scan tokens left to right: if the
Example: 3 4 + evaluates to 7. Another example: 5 1 2 + 4 * + 3 - evaluates to 14.
Advantages of ReversePolish notation include simplified parsing and evaluation, especially on stack machines and calculators. It