What is a Variable?

A variable is a storage container used to store data. Just like you keep items in a box, a variable stores values in programming — such as numbers, text, or any information.

Definition (Simple Professional English)

A variable is a named memory location that stores a value, and this value can be changed during the execution of a program.

Why is it called "Variable"?

It is called a variable because its value can change at any time.

// C language example
int age = 20;
age = 21;    // value changed

What is the purpose of a variable?

- To store data temporarily in memory
- To access stored values whenever needed
- To make a program dynamic (you cannot work with fixed values)

Real-life Example

Think of your "wallet" — you can add money, remove money, and the amount can change anytime. Similarly, a variable acts like a wallet where the stored value can change.

Programming Example (C Language)

int number = 10;     // integer type variable
float marks = 92.5;  // decimal type variable
char grade = 'A';    // character type variable

✔ Final Professional Line

A variable is a named memory location that stores data and whose value can change during program execution.