A simple GUI that lets the user compute simple arithmetic in Reverse Polish Notation.
Reverse Polish notation (RPN) is a mathematical notation wherein every operator follows all of its operands. For example, if we want to add 3 and 4, we write 3 4 +
Our Reverse Polish Calculator allows us to click 3 (and we see 3 in the display), then 4 (and we see 4), and then +, which performs the calculation and shows the result 7 on the display. Keep in mind that when subtracting, the first number will be subtracted from the first.