The output element represents the result of a calculation.

Ideal to be used with range inputs, as Mike Taylor demonstrates.

The type attribute gives the language of the script or format of the data. If the attribute is present, its value must be a valid MIME type. The charset parameter must not be specified. The default, which is used if the attribute is absent, is "text/javascript"

To resolve a question in the HTML5 Boilerplate repo. Important to note is that the details provided on w3schools misleads that the type attribute is required.

There are four slightly different syntaxes that may be used for attributes in HTML: empty, unquoted, single-quoted and double-quoted.

This can be useful for escaping quotes in attributes, as seen in this example from the recent jQuery 1.4.3 release notes:

<div data-options='{"name":"John"}'></div>