Through this article, I wish to demonstrate creating a Reverse Polish Notation (RPN) Calculator which can be used to evaluate postfix expressions. In a postfix operation, an operator appears after its operands. For example, an infix expression like 25 + 12 would be written as 25 12 + in the postfix notation.
https://www.codeproject.com/Articles/5346603/Reverse-Polish-Notation-RPN-Calculator-in-Python

