• A variable is like a box where you can store information.

• You give the box a name so you can use the information later.

• Variables can store things like numbers, words, or true/false values.

How to Create a Variable?

In JavaScript, you create a variable using one of these keywords:

• var

• let

• const

Example: Create a variable with var

let name = "Alice";
console.log(age);

• Here, name is the variable.

• "Alice" is the value stored inside the variable.

Now you can use name to show or work with "Alice".

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Difference Between let, var, and const

• let — you can change the value later.

• var — old way to create variables, try to use let instead.

• const — cannot change the value once set (constant).

Example: Changing a variable with var

let score = 10;
score = 15;
console.log(score);

Example: Constant with const

const pi = 3.14;
pi = 3.15;  // This will give an error!

Summary :

• Variables store information you want to use later.

• Use varor const to create variables.

• Use var if you want to change the value.

• Use const if the value stays the same.