what is the difference between 'action="#" and action="/" '

Question

what is the difference between action="#" and action="/"

i have been asked to find the difference there but I can't

Answer 1

1. action="#" means it will redirect to the # after the main domain for e.g. www.domain.com/# which show no change on page.
2. action="/" means it will redirect to main domain for e.g. www.domain.com/ which show the index page.