HTML Paragraphs
Paragraphs are defined with the <p> tag.
HTML Line Breaks
Use the <br /> tag if you want a line break (a new line) without starting a new paragraph
The <br /> element is an empty HTML element. It has no end tag.
HTML Output
In XHTML, XML, elements with no end tag (closing tag) are not allowed.
Even if <br> works in all browsers, writing <br /> instead works better in XHTML and XML applications.
You cannot be sure how HTML will be displayed. Large or small screens, and resized windows will create different results.
With HTML, you cannot change the output by adding extra spaces or extra lines in your HTML code.
The browser will remove extra spaces and extra lines when the page is displayed. Any number of lines count as one line, and any number of spaces count as one space.