How many types heading in  html ?

Ans:-
 

<h1> to <h6>

Example:-

<h1>This is a heading</h1>
<h2>This is a heading</h2>
<h3>This is a heading</h3>
<h4>This is a heading</h4>
<h5>This is a heading</h5>
<h6>This is a heading</h6>
<h7>This is a heading</h7>