Components in React

React applications are built using components, which can be functional or class-based.

Functional Components

function Greeting() {
  return <h1>Hello, World!</h1>;
}
export default Greeting;

Class Components

import React, { Component } from 'react';
class Greeting extends Component {
  render() {
    return <h1>Hello, World!</h1>;
  }
}
export default Greeting;