Why react using Functional components code example

Example 1: react functional components

const component = () => {
console.log("This is a functional Component");
}

Example 2: create functional component react

import React from 'react'; const App = () => {  const greeting = 'Hello Function Component!';   return <Headline value={greeting} />;}; const Headline = ({ value }) =>  <h1>{value}</h1>; export default App;