What is the difference between state and props in React?

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In React, both state and props are used to manage and pass data, but they serve different purposes and behave differently.

Props (short for “properties”)

• Passed from parent to child component.

• Read-only: A component cannot modify the props it receives.

• Used to configure or customize a component.

• Think of props like function parameters — they allow parent components to send data to child components.

State

• Managed within a component.

• Mutable: Can be updated using the useState hook (in functional components) or this.setState (in class components).

• Used for data that changes over time — like user input, form values, or dynamic UI.

• When state changes, the component re-renders to reflect the updated state.

In summary, props are for passing data, while state is for managing data within the component.

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