how to write h1 tag in html

1<h1> Sample Text </h1>

1<h1>This is a Heading level 1 created using h1 tag</h1>
2<h2>This is a Heading level 2 created using h2 tag</h2>
3<h3>This is a Heading level 3 created using h3 tag</h3>
4<h4>This is a Heading level 4 created using h4 tag</h4>
5<h5>This is a Heading level 5 created using h5 tag</h5>
6<h6>This is a Heading level 6 created using h6 tag</h6>

1<h1>This is an h1(Heading 1) tag </h1>

1<h1>Hello World</>
2

1<h1>This is an h1(Heading 1) tag <h1>