# A Simple RPN Calculator with Deque

Learn to build a simple RPN calculator with deque.

## We'll cover the following

An **RPN** (**Reverse Polish Notation**) calculator is a stack-based calculator that uses postfix notation, where the operator follows the operands. It's commonly used in printing calculators and, notably, the HP 12C, the most popular electronic calculator of all time.

After becoming familiar with its**operational modality***after* the operands.

Using an algebraic calculator, we would need to press an

We can easily implement an RPN calculator using a stack-based data structure. For example, consider an RPN calculator with a four-position stack:

Get hands-on with 1200+ tech skills courses.