What's the point of having hidden input in HTML? What are common uses for this?

Question

I don\'t see the benefit of having hidden input? If you set the value of the hidden input why not just use that value at the point where you reference this hidden input?

Answer 1

It sends additional information that the user doesn't know or isn't interested in (such as a security token) so that if the form is submitted twice, you can compare the tokens and reject/accept that submission.