Why we use br to break a line

Answer 1

br is short for break. This is to help with the difference between your code in the editor and the output on your page itself. As you can imagine, if it was based solely upon how you typed things in your editor, the formatting would immediately be impacted by all of your markup. So we use <br> to break a line on our page because simply hitting enter in our editor isn't going to create that affect on the web page itself.

Answer 2

coz that's the tag to break line.
it works as the enter key..
complete the course all this basic things are provided...