What is the code for headings and sub-headings-in HTML5?

In case we want to create multiple headings and sub-headings in the document,we can use this hgroup tag.

<hgroup>
         <h1>About dotnetfunda website </h1>
        <h2>Its help for beginners to become intermediate level professionals and help intermediate level professionals to become an expert</h2>

    </hgroup>