Variable

A variable, as hinted by its name, is something that can vary. More specifically, it is a value that you can set and, in most cases, change.

Symbolic

$$\text{let}\; x = 5$$

Java

int myVariable = 5;

JavaScript

const myVariable = 5;

Python

my_variable = 5

Ignore the words in front of the variable that appear in some examples for now. The core concept remains the same.