Sir, how I wrote align centre in. notepad

Answer 1

First make a CSS file.
Example:
Style.css
This is a diffrent file from your html file.

In the head section of your html file add this
<link rel="stylesheet" type="text/css" href="style.css">

In your CSS file add this
text-align:center

Example:
h1{
text-align:center;
}

Answer 2

align attribute is deprecated in html5, do not use it. Use CSS for alignment of html tag.