Props and state in React

In React, both props (short for properties) and state are fundamental principles crucial for data management and communication between components. These concepts serve unique roles, each with its own set of characteristics and purposes.

Props:

Props in React are the inputs that a component obtains from its parent component, similar to function arguments in JavaScript.

• Parent components transmit props to their child components, establishing a means to exchange data between them.
• Props are like messages sent from a parent to a child in React. The child can read-only the messages (props), but it can't change them.
• You have the option to set default values for props by using default values in functional components or defaultProps in class components.

State:

State is a representation of a component's local state. It can be modified within the component.

Functional components are able to use state and other abilities that were previously only available to class components thanks to the introduction of hooks in React.

It's generally a good idea to elevate a state to a common parent component — and provide it down as props when several components need to share the same state.

In React apps, props and state play important roles. Props enable data to flow from parent to child components, while state helps components manage and update their own data. Building reliable and maintainable React apps requires an understanding of when and how to apply each concept.