What is different between <br/> and <br>?

Answer 1

<br> is used in HTML and <br /> is used in XHTML. HTML and XHTML use a different syntax. IE6 for example does not support XHTML. Regarding XML rules all elements should have a closing element and here should be used the XML empty element syntax: a space between the element and the closing-slash. You can read more about that here: http://reference.sitepoint.com/html/html-xhtml-syntax
/*Happy Coding*/

Answer 2

Towards the above post, HTML and XHTML are the same thing, for the most part. XHTML is a more strict version of HTML where all tags must be up-to-date, closed, positioned and written (caps) properly.
<br /> is the proper version of <br>. Both will work in HTML but only the first one will work in XHTML.

Answer 3

Thank u