What maxlength attribute do in html?

Question

I did not understand the function of maxlength attribute. Please help if you know what it does.Please explain?

Answer 1

It sets a limit to input

Answer 2

it set limit for input size

<input type="text" maxlength="30">

now you can't enter more then 30 characters in input text field

Answer 3

@Prajwal, How means?
Dhruv gave you the code.
Do you want to know internal working of it?

Answer 4

How?