Math basics

Variables¶

A variable is a symbol that refers to an unspecified object.

We use mathematical typesetting, such as $a$ and $x$, for mathematical variable symbols. By contrast, we use fixed font typesetting, such as a and x, for programming variable names.

The information above is lifted from a Wikipedia article.

We say that the variable represents or denotes the object. The variable’s value is any valid candidate for the object.