📦 ReactJS – State

📌 What is State in React?

State is a built-in object that allows components to **store and manage data** that can change over time.

The useState hook is used to declare state variables in functional components.

You can update state using the setter function returned by useState.

Every time state changes, React re-renders the component automatically.

State can be used in multiple components independently.

Each component manages its own state using useState hook.

Props and State are both used to store data in React, but they have key differences:

• Props: Passed from parent to child, immutable, used for communication.
• State: Managed inside the component, mutable, used for data that can change over time.