HTML পরিচিতি

HTML কি ?

HTML হল একটি markup language যার মাধ্যমে কোন web pages গঠন করা হয় ।

• HTML এর পূর্ণ রূপ Hyper Text Markup Language
• Markup Language বলতে কতগুল markup tags এর সমন্বয়এ গঠিত ভাষা কে বোঝাই ।
• HTML ডকুমেন্ট  HTML tags এর মাধ্যমে বর্ণনা করা হয়।

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HTML এর উদারন -

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উদারন এর বর্ণনা

• DOCTYPE ট্যাগ এর মাধ্যমে এখানে ঘোষণা করা হয় যে এটি একটি HTML ডকুমেন্টস ।
• <html> এবং </html> ট্যাগ এর মাঝে HTML ডকুমেন্টস বা HTML কোড লেখা হয় ।
• <head> এবং </head>  ট্যাগ এর মাঝে উক্ত HTML ডকুমেন্টস এর তথ্য থাকে ।
• The text between <title> and </title> provides a title for the document
• The text between <body> and </body> describes the visible page content
• The text between <h1> and </h1> describes a heading
• The text between <p> and </p> describes a paragraph

Using this description, a web browser can display a document with a heading and a paragraph.

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HTML Tags

HTML tags are keywords (tag names) surrounded by angle brackets:

• HTML tags normally come in pairs like <p> and </p>
• The first tag in a pair is the start tag, the second tag is the end tag
• The end tag is written like the start tag, but with a slash before the tag name

	The start tag is often called the opening tag. The end tag is often called the closing tag.

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Web Browsers

The purpose of a web browser (Chrome, IE, Firefox, Safari) is to read HTML documents and display them.
The browser does not display the HTML tags, but uses them to determine how to display the document:

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HTML Page Structure

Below is a visualization of an HTML page structure:

	Only the <body> area (the white area) is displayed by the browser.

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The <!DOCTYPE> Declaration

The <!DOCTYPE> declaration helps the browser to display a web page correctly.
There are different document types on the web.
To display a document correctly, the browser must know both type and version.
The doctype declaration is not case sensitive. All cases are acceptable:

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Common Declarations

HTML5

HTML 4.01

XHTML 1.0

	All tutorials and examples at W3Schools use HTML5.

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HTML Versions

Since the early days of the web, there have been many versions of HTML:

Version	Year
HTML	1991
HTML 2.0	1995
HTML 3.2	1997
HTML 4.01	1999
XHTML	2000
HTML5	2014