--- title: Hello World --- ## Hello World !! Every language learning starts with Traditional Hello World example. Here, you get introduced to React with the same HelloWorld program. Everything in React is a component. But before that we need to make sure to have node.js and npm installed in the computer. Optionally we can use CRA(Create React App) which is a tool built by developers at Facebook to help you build React applications. It saves you from time-consuming setup and configuration. You simply run one command and create-react-app sets up the tools you need to start your React project. We can install it through the following commands ``` npm install -g create-react-app create-react-app my-app cd my-app npm start ``` The command line should give you an output where you can find the application in the browser. The default should be localhost:8080. If you are only using IE or Edge on your Windows machine, I can recommend you to install Chrome as well to access the developer environment and the React Developer Tools which are available as Chrome extension. ** If you don't use Chrome, there are extensions that let you use Chrome extensions. ** ![alt react starting page](https://cdn-images-1.medium.com/max/800/1*Qcry5pCXIy2KeNRsq3w7Bg.png) #### src/App.js copy the code below and paste it into src/App.js ```javascript import React from 'react'; class App extends React.Component{ constructor(props) { super(props); } render(){ return(
Hello World !!