install npm packages inside project code example

Example 1: how to install any package in node.js

#how to install any specific package in nodejs Application
# Syntex
npm install packagename

# example:
npm install express
npm i express

#if you install globally then type 
npm install express -g

Example 2: how to import npm packages in node.js?

//in cmd prompt: 
//npm i <package-name>

//defining package in code: 
const package = require("package-name")