Summary

Reverse Polish notation is a postfix_notation system where operators follow operands. In reverse_polish_notation, expression evaluation uses a stack: push numbers, then for an operator pop two values, compute, and push the result. no_parentheses are needed because evaluation_order is explicit. Typical operators include +, -, *, /. Example: 3 4 + represents 7. RPN is compact and avoids precedence rules. Remember: read left to right, apply each operator_after_operands step, and keep the stack updated.