rpn-ts is a lightweight Reverse Polish Notation calculator implemented in TypeScript.

It supports stack-based evaluation of basic mathematical expressions using common operators like +, -, *, and /. Useful for embedded calculations, REPLs, or scripting environments where postfix logic is preferred.

Features:

• Postfix notation (RPN) expression parser
• Stack-based evaluation
• Basic arithmetic operator support
• Modular ESM/CJS builds
• Zero dependencies

Example:

evaluateRPN("3 4 + 2 *"); // returns 14
evaluateRPN("5 1 2 + 4 * + 3 -"); // returns 14