HTML Block and Inline Elements
HTML elements can be categorized into two categories- Block Level Elements
- Inline Elements
Block-level Elements
A block-level element always starts on a new line and takes up the full width available (stretches out to the left and right as far as it can).Block elements appear on the screen as if they have a line break before and after them. For example the <p>, <h1>, <h2>, <h3>, <h4>, <h5>, <h6>, <ul>, <ol>, <dl>, <pre>, <hr />, <blockquote>, and <address> elements are all block level elements. They all start on their own new line, and anything that follows them appears on its own new line.
Inline Elements
An inline element does not start on a new line and only takes up as much width as necessary.Inline elements, on the other hand, can appear within sentences and do not have to appear on a new line of their own. The <b>, <i>, <u>, <em>, <strong>, <sup>, <sub>, <big>, <small>, <li>, <ins>, <del>, <code>, <cite>, <dfn>, <kbd>, and <var> elements are all inline elements.
Grouping HTML Elements
There are two important tags which we use very frequently to group various other HTML tags (i) <div> tag and (ii) <span> tagThe <div> tag
This is the very important block level tag which plays a big role in grouping various other HTML tags and applying CSS on group of elements. Even now <div> tag can be used to create webpage layout where we define different parts ( Left, Right, Top etc) of the page using <div> tag. This tag does not provide any visual change on the block but this has more meaning when it is used with CSS.Example
Following is a simple example of <div> tag.
The <span> tag
The HTML <span> is an inline element and it can be used to group inline-elements in an HTML document. This tag also does not provide any visual change on the block but has more meaning when it is used with CSS.The difference between the <span> tag and the <div> tag is that the <span> tag is used with inline elements where as the <div> tag is used with block-level elements.
Example
Following is a simple example of <span> tag.
<h1>My <span style="color:red">Important</span> Heading</h1>