NODE JS BASIC CODE

 Ex1 Find out a type

let a=10

console.log("Value of a : " + a)

console.log("Type of a : " + typeof a)

let b="hello"

console.log("Value of b : " + b)

console.log("Type of b : " + typeof b)

Ex2 Object

let dept =  {

name:"CSE",

description : " Computer Science and Engineering",

code : 44,

address: { block : "CS" , location : "TN"}

};

console.log(dept);

console.log(typeof dept);

console.log(dept.address.location);

Ex3 Function

function add(n1,n2)

{

return n1+n2;

}

let a=10

let b=20

console.log(a, '+' , b , '=' , add(a,b))

Ex4 String

let x ="hello"

let y="world"

console.log(x+y);

Ex no 5 Http and local host port

let http = require("http");

http.createServer(function (req ,res)

{

res.writeHead(200,{'Content-Type':'text/plain'});

res.end("My First Web Program");

}).listen(9090, ()=>console.log("My web Server is running on 9090"));

Ex 6 Upper Case

let http = require('http');

let uc = require('upper-case');

http.createServer(function (req, res) {

    res.writeHead(200, { 'Content-Type': 'text/html' });

    res.write(uc.upperCase("Welcome u all to this workshop"));

    res.end();

}).listen(9000, () => {

    console.log("Server listening on  http://localhost:9000/");

});

Ex7 Event

let e=require('events');

let eh=new e.EventEmitter();

let myhandler=  function() {

console.log("test");

}

eh.on('demo', myhandler);

eh.emit('demo');

eh.emit('demo');

eh.emit('demo');

eh.emit('demo');

Ex 8 Timer

function myfun(){

console.log("my training");

}

setTimeout(myfun,3500);