npm add express code example

Example 1: install express globally

$ npm install express --no-save

Example 2: install express

npm i express

Example 3: npm express

$ npm install express

Example 4: npm express

// npm install express
const express = require('express');
const app = express();

app.get('/', (req, res)=> {
  res.send('Hello World');
}) 

app.listen(3000,()=>{
 console.log("starting...");
});