why some of the tags has no closing tag??

Answer 1

The content or code is used in between start and closed tags.
For example paragraph content is displayed in between paragraph tags as <p> content </p>
If there is no content or the tag is for specific usage then we use only single tag.
For example Break tag <br>, form tags like input button, etc..
We can use single tags like <br> or <br />

Answer 2

inline tag elements like IMG ,BR wont have closing tags

Answer 3

that elements which have no attribute inside it .thats known as empty tag nd thats why they have not ending tag , they cann't hold the text as well as other elements ..like hr tag

Answer 4

Kshama Sachan , what about form tags they have attributes right?? Even they hold the text as values??