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What are the 4 Ways to Declare a JavaScript Variable?



If you are a web student then JS will be there in your course curriculum for sure. It is an amazing front-end development language that adds interactivity to any website. After learning JS there are many career options are available for you such as a web developer, JavaScript developer, front-end developer, and many more.

You can learn other advanced frameworks with web development courses in Delhi too.


A short description of JavaScript


JavaScript is the most famous programming language and it is light weighted, open-source, and easy to learn. As we all know, HTML is used to create a static page with some content in it. And, The CSS describes the look and formatting of a web document. After making a static website design we need something for making the website dynamic in which users can also interact with it and that’s the reason for using JavaScript.


See, to master both markup and style sheets, it is important to go to HTML5 & CSS3 training Institute in Delhi.


Let’s understand variables in JavaScript :


So, In JavaScript we can declare variables in four ways :

var: var is a keyword for declaring variables in JavaScript. The scope of this keyword is global. When we declare any variable using the var keyword then it can be accessed globally. So this is a good option for mini projects but if you are working on big projects then using other keywords can be more beneficiary to you.


Syntax of var

var variableName = "Value;"


Let: let is also a keyword for declaring variables in this programming language. And the scope of let is local. So we can use it in any application. It is more secure because of having a local scope.


Syntax of let

let variableName = "Value;"


Const: This keyword I more secure than let because it can be accessed only by its parent. There is a difference between const and let. And the difference is that we cannot re-assigned the value of const. so have to assign the value in const at the time of declaration.


Syntax of const

const variableName = "Value;"


The last way of declaring variables in JavaScript is using nothing. We can also declare variables in JavaScript by using nothing let’s take a look at the example:


color name = “Red”;


So, these are four ways to declare variables in JS. Now, if haven’t got the concerts clearly then it’s time for pursuing a JavaScript course in Delhi. See, if you are interested then you can attain more advanced website designing skills with the help of web design courses in Delhi offered by ADMEC Multimedia Institute.


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