JAVASCRIPT

iamsaurav28 — Mon, 04 Sep 2023 04:19:08 +0000

JavaScript was build in 1995 by Brendan Eich
JavaScript is a extra-ordinary just in time complied programming language that confirms to ECMAScript Specification.
JavaScript close at hand HTML and CSS is one of the core technologies of the world wide web.
JavaScript can be used to build server side applications.
JavaScript is the most Popular programming language according to the 2022 stack overflow developer survey.

Two ways of implementation of JavaScript in HTML

Inpage Javascript
External javascript

     <head>
          <script>
          </script>
     </head>
     <body>
        <h1>Inpage Javascript</h1>
      <script></script>
     </body>
</html>

*Second is external JavaScript helps to connect js file with html file, if file name is content.js,  it will be insert html as
<html>
     <head>
          <script src="content.js"></script>
     </head>
     <body>
     </body>
</html> ```

What are the comments in Javascript ?
There are Two types of comments.

Single line comment
Multiple line comment

commented code will stay in code but wont its like body without live.

if your any single line of code is useless you can comment it with two slash //
for example


<body>
      //<h1>Inpage Javascript</h1>
 </body>

And if your code is than more 1 line, you can comment it with slash and star /* from start till end of code
for example


<body>
      /*<h1>i am double line code</h1>
        <div>hello world </div>
        <div>hello coders</div>*/
</body>

what are the variables ? in JavaScript and what are its types?

A JavaScript variable is simply a name of storage location. There are two types of variables in JavaScript.

local variable and
global variable.

Variables are Declares in 3 Types
1.Var (Global scope)
2.let (Block scope)
3.Const (Block scope)

global scope has access to work anywhere in program, But block scope only works inside the { curly brackets}.


if(condition){        if(condition){          if(condition){
var a="hello world"     var a="hello world"      var a="hello world"
}                         console.log(a)           console.log(a)        
console.log(a)           }                         }

What are the Data Types in Javascript ?

String (if data is inside "Quotes"),
Number (if data is a 1,2,3 number),
Boolean (if data is true or false),
Array (if data is inside [ square bracket ]),
Object (if data if under {curly bracket}),
Null (if data is null),
Undefined (no data).

what are the Arithmetic Operators in javascript and its uses ?

+ (plus sign) used for addition purpose.
- (minus sign) used for subtraction of values.
* (star sign) used for multiplication.
** (2 star sign) used for exponentiation.
/ (slash sign) used for division.
% (percentage sign) for modulus remainder.
++ (2 plus sign) used for increment.
-- (2 minus sign) used for decrement.

and there are also an Assignment Operator and Comparison Operators

this are the Assignment Operator given below

Now Lets check the Comparison Operator's Below

== (2 equal to) must have same value.
=== (3 equal to) must have same value and same data type.
!= (xcalamtion and equal) shows not equal value.
!== (xclamation and 2equal) not equal value or not equal type.
> (greater than)
< (Lesser than)
>= (greater than or equal to)
<= (Lesser than or equal to)

What is Css?

iamsaurav28 — Mon, 27 Sep 2021 06:20:35 +0000

CSS stands for Cascading Style Sheets. It is a language designed to format the layout of Web pages. It is used to enable the separation of presentation and content, which includes layout, colors, and fonts. They improve the accessibility of content, make it more flexible. CSS enables the specific look of HTML in the browser. CSS has lots of advantages. CSS is a great time-saver; you can write CSS once and then use the same sheet in multiple HTML pages. It provides multiple device compatibility; style sheets allow content to be optimized for more than one type of device.

Before you continue, you should have a basic knowledge about HTML because, with HTML tags, we create our pages, and with CSS, we give style to our tags. It means we make our page more beautiful. HTML is used to structure content while the CSS is used for structured formatting content. With CSS, we can change the color, background-color, font-size, etc. Our CSS guide provides some sections which cover the basic knowledge, CSS Properties, and Selectors.

What is box modal in CSS?

Image result for what is box model in css
CSS box model is a container which contains multiple properties including borders, margin, padding and the content itself. It is used to create the design and layout of web pages. It can be used as a toolkit for customizing the layout of different elements.

In CSS, the term "box model" is used when talking about design and layout.

The CSS box model is essentially a box that wraps around every HTML element. It consists of: margins, borders, padding, and the actual content. The click on box model

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JAVASCRIPT

What is Css?