A simple variable, also called as a . . . . . . . . variable, is one that is unrelated to any other variable in memory.

A changing variable is a variable that can change its value over time.

A dynamic variable is a variable that is created on the fly, as needed.

A static variable is a variable that is created when the program starts and remains in memory until the program ends.

Here is a simple example of a scalar variable:

int x = 10;

In this example, the variable x is a scalar variable that can hold only the value 10.