# Constant and Change

Derek Rayside talks about this idea

Aristotle was studying what changes and is constant.

Isaac Newton invented Isaac Newton invented Calculus to study motion (change), which he used to build the foundations of Isaac Newton invented Calculus to study motion (change), which he used to build the foundations of Calculus to study motion (change), which he used to build the foundations of ⚙ Engineering-Science MOC and physics.

So in programming, we should know what changes and what stays constant. So use `const`

as often as possible to denote what stays constant.