what is doc typ in html ?
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The DOCTYPE declaration in HTML is an instruction to the web browser about what version of HTML the document is written in, and how to interpret it.
The DOCTYPE declaration is usually placed at the very beginning of an HTML document before any other content or markup. It is written in all caps and starts with the <!DOCTYPE> tag, followed by the name of the document type and the version of HTML being used. For example, the DOCTYPE declaration for HTML5 looks like this:
<!DOCTYPE html>
The DOCTYPE declaration is important because it tells the web browser how to parse and render the HTML document. Different versions of HTML have different syntax and rules, so if the browser doesn’t know which version is being used, it may not be able to display the content correctly.
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HTML <!DOCTYPE> tag is used to inform the browser about the version of HTML used in the document. It is called as the document type declaration (DTD).
Technically is not a tag/element, it just an instruction to the browser about the document type. It is a null element which does not contain the closing tag, and must not include any content within it.