java script (variables)

-


Hello friends

Welcome to next blog about to java script.. In this blog we discuss about java operators.

first we learn how to assign value to variables.use "=" for assign values

          var x = 5;         
          var y = 2; 

Add operation

use this operation to add values.
          y=x+z

multiplication operator (*)

use this for multiplies numbers
      z=x*y

Divide operator( / )

use this for divide numbers
     z=x/y


Some other operations

   " - " => Subtraction
 " ** " => Exponentiation
  " % " => Modulus
  "++" => Increment
 "--" => Decrements

Assignment Operators

   =, +=, -=, *=, /=, %=, **=

+ operator also use to add (concatenate) strings

var txt1 = "saman";
var txt2 = "perera";
var txt3 = txt1 + " " + txt2;


Comparison Operators

== => equal to
=== => equal value and type
!= not equal
>  =>grater than
< => less than
? ternary operator


see you in next blog

thank you




Comments

Post a Comment

Popular posts from this blog

MERN App

-
rest api react node mongo express front end App.js import React from 'react' ; import "bootstrap/dist/css/bootstrap.min.css" import {BrowserRouter as Router , Route , Link} from "react-router-dom" ; import './App.css' ; import ViewCourse from "./Component/viewCourse" ; import EditCourse from "./Component/editCourse" ; import AddCourse from "./Component/addCourse" ; import DeleteCourse from "./Component/deleteCourse" ; class App extends React.Component{ render () { return ( <div style = {{ background : 'grey' , height : '752px' , position : 'relative' }} > <Router> <div className ="App" ><br/> <h1> Online Course </h1> <Link to ="/" > Courses </Link> <Link to ="/create" > Add Course ...
Read more

Node Introduction

-
What is NodeJS..??    Node is open source server environment.. it runs various platforms likes windows, unix, mac os etc. node uses js on the server.  node can generate dynamic page content. can create, open,read,write,delete, and close files on the server and can modify data in your database. Setup Node js.. first you need to download and install node js  https://nodejs.org/   then check your node version using node -v type in cmd then you need to connect to port. for that you need to install express using npm install express --save   after that you need to import react react-DOM express libraries then you need to write following code to connect to port. your connection is successful print the message. app.listen(3000, (err) =>{   if(err){      console.error(err);      return;       }    console.log("Listen port 3000"); }); Before this you need to add details about project...
Read more

React installation

-
Image
Welcome to my next blog.       in this blog i'm share with some coding example of react. How to start react project:- you need to use IDE to start using. you can simply use VS code for coding. and also have some paid development tools like webstom. Some university's provide free license for this IDE. After that first you need to create project.To start project you need to write like this.    open the cmd in your  project folder location   then you need to write     npx create-react-app <app name>   then need to go app folder using cd <app name> next you can start react project using npm start key word if you haven't install react-dom need to install it    npm install react-dom --save then you need to install webpacks using these codes   npm install webpack webpack-dev-server webpack-cli --save If you working with html files you need to install babel packages   ...
Read more