What are the differences between Class and Functional components? Class और Functional components में क्या अंतर है?

// Class Component
class Welcome extends React.Component {
  constructor(props) {
    super(props);
    this.state = { count: 0 };
  }
  
  render() {
    return <h1>Count: {this.state.count}</h1>;
  }
}

// Functional Component
function Welcome() {
  const [count, setCount] = useState(0);
  return <h1>Count: {count}</h1>;
}