Difference between variables and object in JavaScript

Definition

Containers for the storing single data values.

The Complex data structures that store collections of the data and entities.

Usage

The Holds single data values.

The Stores complex entities and data structures.

Declaration

Declared using the keywords like var, let, const.

To Declared by defining key-value pairs within the curly braces.

Mutability

Can be updated or reassigned with the different values.

Properties can be added, updated or deleted.

Example

let num = 10;

const name = ‘John’;

let person = { name: ‘Alice’, age: 25 };

Access

Access using the variable name.

Access properties using the dot notation or bracket notation.

Data Type

Can hold different data types.

Can contain any data type including the other objects.

Purpose

Used for the storing individual values.

Used for the grouping related data or entities together.