</br>

Question

If </br> tag is an empty tag and has no end tag then why we have to put <//br> after </br>

Answer 1

wait what?
we only use <br> or <br />.
br tag has no end tag. so those two "<//br> and </br>" are incorrect syntaxes.

Answer 2

no its wrong we only use </br> only single time

you also use <br> tag only
no problem
if you have doubt then messege me

Answer 3

<br> is for an HTML line break

<br/> or <br></br> (no element between tags) can be used with XHTML or XML

<br /> (include the space) is used for compatibility between both HTML and XHTML.

https://www.tutorialspoint.com/What-is-the-correct-way-of-using-br-br-or-br-in-HTML