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What is the use of the VAR element type in HTML?
In this article we will discuss about Var element in HTML. We will learn about its properties and its importance in HTML. And why we specifically use it in mathematical expression. But before we learn about VAR we must know about HTML element.
HTML element is a section of an HTML document that tells the browser how to represent the information of that section. It contains necessary information like instructions, idea of the webpage and main content.
HTML element mainly consists of three parts −
Opening tag − It marks the beginning of the HTML element and tells the browser about the starting of the content.
Closing tag − It marks the closing of the HTML element and tells the browser where it has to stop looking for content.
Content − This part contains the main information of the webpage and it lies between the opening and closing tag. Only this part of the HTML element will be visible to the user on the webpage.
The var in HTML stands for variable. <var> tag is used for marking a variable in programming or in a mathematical expression. It is mostly used while writing a equation to show the variable of the equation differently. <var> tag is a container tag i.e it has both opening and ending tag.
By default the content inside <var> element renders as italic text on the browser but we can modify it by applying font CSS properties on the <var> element.
Now we will be looking at some examples of using a var tag in different situations.
Let us see an example –
<!DOCTYPE html> <html lang="en"> <head> <title>VAR Element</title> </head> <body> <h1>This is an example of VAR element in HTML</h1> <p> <var>VAR</var> element is used to mark the variable in a mathematical expression or equation. The content written inside the var element renders as <var>italic </var> text on the browser.</p> </body> </html>
Following is an example for var element where we print a quadratic equation.
<!DOCTYPE html> <html lang="en"> <head> <title>VAR Element</title> </head> <body> <h1>This is an example of VAR element in HTML</h1> <p>The standard form of a quadratic equation is <var>a</var><var>x</var><sup>2</sup>+<var>b</var><var>x</var>+<var>c</var>=0 and the basic form of this equation is <var>x</var><sup>2</sup>+<var>b</var><var>x</var>+<var>c</var>=0</p> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <title>VAR Element</title> </head> <body> <h1>This is an example of VAR element in HTML</h1> <p>The area of a triangle is: 1/2 x <var>b</var> x <var>h</var>, where <var>b</var> is the base, and <var>h</var> is the vertical height. And the area of a rectange is: <var>l</var>x<var>b</var>,where <var>l</var>is the length of the rectangle, and <var>b</var> is the breadth of the rectangle.</p> </body> </html>
Why should we use VAR element in HTML
The content that we write between two tags renders differently on the browser, that is somewhat similar to an italicized text. Then the question comes in mind is that why don’t we use an italic tag instead of var tag when all we get is just italic text. The answer to that question is SEO.
SEO − Search engine optimization is referred to as SEO. It aids in website improvement so that it appears higher in the many search results when customers look for that product or similar ones. This will be advantageous because more of the website's actual target audience will be able to view it. Additionally, it aids in preserving traffic and organic.
Every tag in HTML is accompanied by some sort of meaning. For instance, the h1 tag identifies a primary heading and all of the text within it is associated with that subject. Below is a list of other HTML tags with unique meanings −
Aside − isolates the content within it from the main content.
Article tag − isolates the content from the rest of the article.
Section − isolates group of content from other content on website.
Header − isolates the top of the page.
Footer − isolates the bottom of the page.
Nav − basically contains the navigation menu for the page.
Similar to how the var tag and emphasised formatting have entirely different semantic meanings. The <var> tag informs the browser and the search engine that the information included there is some form of mathematical expression or its result. However, the italicised language just indicates that the author intends to draw attention to that word. Because of this, articles that utilise <var> tags perform better in search engine optimization and rank higher than those that use italic or em tags to define expression.
This is the example of marking variable using VAR element −
<!DOCTYPE html> <html lang="en"> <head> <title>Example</title> </head> <body> <h1>Marking variable using VAR element</h1> <p><var>VAR</var> element is used to mark the variable in a mathematical expression or equation.</p> </body> </html>
This is the example of marking variable using Italic element −
<!DOCTYPE html> <html lang="en"> <head> <title>Example</title> </head> <body> <h1>Marking variable using Italic element</h1> <p><i>VAR</i> element is used to mark the variable in a mathematical expression or equation.</p> </body> </html>
As we can see that both VAR and Italic element generates the same output but the webpage which has used VAR tag will be ranked above in the search results even though there content is same.
In this article we discussed about VAR element in HTML. We learnt about different ways of using VAR element and at last we discuss how we can use it for better search engine optimization.
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