Demo of block and inline elements

This is a div.
This is another div.

This is a paragraph.

This is another paragraph.

This is a span. This is another span.
This is a section.
This is another section.
This is a header.
This is another header.
This is an em.This is another em. This is a strong.This is another strong. Random image 1 Random image 2 This is a summary. This is another summary. 
This is a pre.
This is another pre.
This is an article.
This is another article.

Summary:

strong, em, span and img are the only inline elements among all of them.