HTML TAGS

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HTML tags are the basic building block of webpages. HTML tags determine how the browser will format and display the HTML content.

HTML tags are used in nested form. Like: <head and <body tags are used inside <html tag, inside <head we use <title tag and inside <body we use other tags like header,paragraph etc.

Look below at the example to understand the basic structure of web page.You can see how elements are nested.

Example

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Lets discuss basic elements here:-

HTML <!DOCTYPE>

A <!DOCTYPE> is an information that identify a particular SGML (Standard Generalised Markup Language) with a Document Type defination.
<!DOCTYPE> is very first thing that is mentioned in any HTML document although <!DOCTYPE> is not an HTML tag.
<!DOCTYPE> shows the document type of the file.And also tells server what version of HTML file it is.
<!DOCTYPE> is not case sensitive.so you can write it in lower-case letter but it is suggested to write in upper-case.

html tag

<html> tag is called root tag of HTML document because it is root element in tree of elements of a web page.
All other elements like head or body goes inside it.
It contain all other element of web page except <!DOCTYPE>.

HTML head tag

<head> contain all necessary information of web page.
Information like: title,base,script,meta,style all resides in <head>.
Contents of <head> element is not diaplayed in web page.

Example

HTML body tag

A <body> tag defines body of HTML document.
All the element which are displayed over web page lies inside <body> tag.
Paragraph,heading,images,video,link every visible content is defined inside <body> tag.

Example

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Heading tags

Heading tags are used to give headings in HTML documents.
There are six levels of headings representing six different sizes of heading.
Headings are <h1>,<h2>,<h3>,<h4>,<h5> and <h6>. Where <h1> is biggest in size and <h6> is smallest in size.

Example

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Paragraph tag

<p> tag defines paragraphs in HTML documents.
Writing content to one <p> tag and then moving to the next <p> tag automatically changes the paragraph in the web page.

Example

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Preformatted tag(pre tag)

<pre> tag allows you to define spacing and lining itself in an HTML document.
Content on a web page is decorated in the same fashion as you define in <pre> tag.

Example

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HTML br (line breaking tag)

In HTML line breaking is specified by the <br> tag.

The <br> tag is an empty tag.We need not to close it in HTML but in XHTML it is not valid.

Example

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NOTE:It is valid to use <br> in HTML but in XHTML it's not valid instead we use <br />

HTML horizontal line

In HTML horizontal line is specified by the <hr> tag.

The <hr> tag is an empty tag.We need not to close it in HTML but in XHTML it is not valid.

Example

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NOTE:It is valid to use <hr> in HTML but in XHTML it's not valid instead we use <hr />.

HTML center tag

HTML <center> tag is used to put any content in the center of the block of webpage.

Example

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