Is it necessary to write h1 only or we can write else than 1 like 2, 3, 33 etc.

Question

document.write("hi<\h56>");

Answer 1

Not sure what you are doing with that. But if you meant the HTML headings, it is only valid with number from 1 to 6, with h1 being the largest and h6 be the smallest.

<h1>...</h1>
...
<h6>...</h6>

If your question wasn't about headings, you better edit your question to make it more clear so others can help you.

Answer 2

Thankyou