how to javascript

console.log("JavaScript is the most powerful and most efficient language in the world")
//Here's Why
You can manage the Server with this using Node.JS and Express.Js

These are the most famous libs for JS 

For Building Mobile App
. React Native and Redux

For Building Windows App

. Electron

For Machine learning
. TensorFlow JS

>'hello'.toUpperCase()
'HELLO'

var  = "";