Rusty  Shanahan

Rusty Shanahan

1620196012

Everything You Need to Know About Primitive Types in JavaScript

Javascript has seven primitive data types:

  1. string
  2. number
  3. bigint
  4. boolean
  5. undefined
  6. symbol
  7. null

In JavaScript, a primitive is any value that isn’t an object.

The typeof  operator tells you what type a primitive value is.


1. String

It is important to note that strings can be either a primitive, string literal, or an object. Javascript automatically converts string primitives to objects to enable the user to use the handy array of functions available for use. If you wanted to convert a string object to a primitive, you would use the valueOf() method.

let message = "Hello World";
typeof message; // 'string'

2. Number

In other programming languages, you can have numbers be defined as floats, integers, doubles and so on and so forth. Javascript simplified this feature by just making every number it comes across Number, with an exception.

let password = 123456789;
typeof password; // 'number'

3. BigInt

This is similar to Number however, it allows you to safely represent integer values larger than 253. You can create a bigint by appending n to the end of the number or by wrapping the number, or string for this case, in the BigInt() constructor.

let launchCodes = 66777888889999912345n;
typeof launchCodes; // 'bigint'

4. Boolean

This data type is what contains the values true or false. This is great in that you can use other values to represent that same concept like 0 for false, and 1 for true.

isBool = true;
typeof isBool; // 'boolean'

// Instances of wrapper classes, like `Boolean`, are objects, **not** primitives.
typeof new Boolean(isBool); // 'object'

5. Undefined

This value is automatically assigned to variables that have just been declared but not defined. If you were to put this in an if statement, the value would be false so this is another handy thing you could use like mentioned in the Boolean section.

let x;

typeof x; // 'undefined'

6. Symbol

A Symbol is a value created by invoking the Symbol function which is guaranteed to create a unique value. It takes one parameter, a string description, that will show up when you print the symbol.

let x = Symbol("this is a symbol");
typeof x; // 'symbol'

7. Null

null is special because the typeof operator reports its type as 'object'.

typeof null; // 'object'

Original article source at https://masteringjs.io

#javascript #programming 

What is GEEK

Buddha Community

Everything You Need to Know About Primitive Types in JavaScript

Rahul Jangid

1622207074

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

  • For single line comment in JavaScript we have to use // (double slashes)
  • For multiple line comments we have to use / * – – * /
<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.

Does your business need an interactive website or app?

Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.

The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.

Get your business app with JavaScript

For more inquiry click here https://bit.ly/31eZyDZ

Book Free Interview: https://bit.ly/3dDShFg

#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers

Niraj Kafle

1589255577

The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips

Macey  Kling

Macey Kling

1598629020

Data Types In JavaScript

JavaScript data types are kept easy.

While JavaScript data types are mostly similar to other programming languages; some of its data types can be unique. Here, we’ll outline the data types of JavaScript.

Firstly, JavaScript data types are separated into three; primitive, composite (reference), and special data types. Before going to data types of JavaScript, let’s begin with their definitions.

Primitive

The most basic data type in JavaScript where it does not require any complex statement. Number, string, and boolean are known to be primitive data types.

Composite (reference)

Composite data types are made up of heterogeneous data as a unit. They can contain every data types including other composite values in JavaScript. They’re objects, arrays, and functions.

Numbers

Numbers are simply floats and integers in JavaScript. When we define integers, they’re numbers without decimal points (for example 9). And floats can be defined as numbers with a decimal point in JavaScript (for example 3.4).

String

Similar to other programming languages, strings are textual data being represented as a single or double quotes surrounding one or more characters.

Booleans

Similar to other programming languages; booleans are used to check whether statements are true or false. It’s generally used to check the validity of statements in JavaScript and all other programming languages out there.

Arrays

Arrays are a type of object used for storing multiple variables in a single variable. Each one is called an element and arrays start with 0.

Functions

Similar to other programming languages; functions give the output in a simple matter. And there are lots of built-in functions in JavaScript that gives you the output you need to execute a block of code if the statements are written correctly. They can be assigned to variables as they’re objects at the same type.

#javascript-programming #javascript-basics #datatypes-in-javascript #javascript #software-development

Rusty  Shanahan

Rusty Shanahan

1620196012

Everything You Need to Know About Primitive Types in JavaScript

Javascript has seven primitive data types:

  1. string
  2. number
  3. bigint
  4. boolean
  5. undefined
  6. symbol
  7. null

In JavaScript, a primitive is any value that isn’t an object.

The typeof  operator tells you what type a primitive value is.


1. String

It is important to note that strings can be either a primitive, string literal, or an object. Javascript automatically converts string primitives to objects to enable the user to use the handy array of functions available for use. If you wanted to convert a string object to a primitive, you would use the valueOf() method.

let message = "Hello World";
typeof message; // 'string'

2. Number

In other programming languages, you can have numbers be defined as floats, integers, doubles and so on and so forth. Javascript simplified this feature by just making every number it comes across Number, with an exception.

let password = 123456789;
typeof password; // 'number'

3. BigInt

This is similar to Number however, it allows you to safely represent integer values larger than 253. You can create a bigint by appending n to the end of the number or by wrapping the number, or string for this case, in the BigInt() constructor.

let launchCodes = 66777888889999912345n;
typeof launchCodes; // 'bigint'

4. Boolean

This data type is what contains the values true or false. This is great in that you can use other values to represent that same concept like 0 for false, and 1 for true.

isBool = true;
typeof isBool; // 'boolean'

// Instances of wrapper classes, like `Boolean`, are objects, **not** primitives.
typeof new Boolean(isBool); // 'object'

5. Undefined

This value is automatically assigned to variables that have just been declared but not defined. If you were to put this in an if statement, the value would be false so this is another handy thing you could use like mentioned in the Boolean section.

let x;

typeof x; // 'undefined'

6. Symbol

A Symbol is a value created by invoking the Symbol function which is guaranteed to create a unique value. It takes one parameter, a string description, that will show up when you print the symbol.

let x = Symbol("this is a symbol");
typeof x; // 'symbol'

7. Null

null is special because the typeof operator reports its type as 'object'.

typeof null; // 'object'

Original article source at https://masteringjs.io

#javascript #programming