Wikipedia containsage calculation templates that self-update every day to keep date and age information current. These are very useful for a dynamic online encyclopedia and save users from having to regularly update that kind of information.

Many articles includingbiography articles contain infoboxes which use these age and date templates.

For example: The article forBenjamin Franklin infobox contains template
{{death date and age|1790|4|17|1706|1|17}}

Results display the date of his death and his age on that date:
April 17, 1790(1790-04-17) (aged 84)

The<nowiki> tag is used to suppress the interpretation of Wiki markup. This is often useful to demonstrate or explain Wikimarkup language to another user.

Wiki markup (and Wiki tags that resembleHTML tags) that are placed between<nowiki> and</nowiki> are not interpreted, and are displayed on the page just the way they are typed. For example, [[this]] would ordinarily form a wikilink, but since it is placed between<nowiki> and</nowiki>, like this:<nowiki>[[this]]</nowiki>, no such link is formed. This is rarely of use in an actual Wikipedia article.

The<nowiki> tag is helpful, for example, when asking questions atthe Teahouse and explaining issues atthe Village Pump as well as on an article's Talk page. In this case 'themarkup code' can be displayed without being actionable.