Basics - Introducing JSX - example 2.

index.js

import React from "react";
import ReactDOM from "react-dom";

function formatName(user) {
  return user.first + " " + user.last;
}

const user = {
  first: "ram",
  last: "charan"
};

const element = <h1>hello {formatName(user)}</h1>;

ReactDOM.render(element, document.getElementById("root"));