模板:Var/doc

Usage

This template is to help facilitate the displaying of variable names (in mathematics, computer source code, wikimarkup in template documentation, metasyntactic variables, etc.) with the semantically correct var>>...</var> tags, which also renders the variable in italics, as is customary. This method is preferred to simply italicizing for many reasons, including accessibility, separation of presentation and content, semantic Web, and metadata. In XHTML and HTML, the var>> element has semantic meaning, while simple italicization does not. This template provides a tiny hint of kerning to compensate for the italicization and enhance readability.

"Variable" in this sense may include arbitrary or unknown names or terms, examples of human input, arithmetical variables in equations, etc. This template (and the underlying XHTML) are generally not used if MediaWiki's [mathmath>[/math] tags (or any other stand-alone mathematical markup) are being used.

Examples

Example

{{var|username}}

outputs the following HTML:

var>>username</var>

which renders as:

username

Note that on the screen or in print, this renders as simple italicization, as does ''username'' (using pairs of apostrophes) or i>>username</i> (using HTML), yet it carries more semantic meaning than either of these methods.

At times, you may wish to use a serif font. This is especially true when attempting to render single-letter variables like "I" (upper-case "i") and "l" (lower-case "L"), since they are nearly indistinguishable (if at all). In such situations, use the {{varserif}} template instead of {{var}}, to make them more distinguishable, like these serif examples: 模板:Varserif, 模板:Varserif.

More examples

Markup	Renders as
The HTML code: {{block indent|{{tag|var|content=username}}}} renders as: {{block indent|{{var|username}}}}	The HTML code: var>>username</var> renders as: username
The commandline should read: {{samp|%}} {{kbd|1=ssh {{var|hostname}}}}<br />(where {{var|hostname}} is the IP address or ...)<br />If it is correct, press {{key press|Enter}}.	The commandline should read: % ssh hostname (where hostname is the IP address or ...) If it is correct, press ↵ Enter.
in this equation, let {{var|x}}{{=}}1 and {{var|y}}{{=}}120 ...	in this equation, let x=1 and y=120 ...
{{para|accessdate|{{var|todays_date}}}}	|accessdate=todays_date

TemplateData

This is the TemplateData for this template used by TemplateWizard, VisualEditor and other tools. See a monthly parameter usage report for Template:Var in articles based on its TemplateData.

TemplateData for Var

Marks text as an HTML variable

模板参数

参数		描述	类型	状态
variable	1	无描述	单行文本	必需
class	class	无描述	字符串	可选
ID	id	无描述	字符串	可选
CSS style	style	无描述	字符串	可选
language	lang	无描述 示例值 c++	字符串	可选
HTML title (hovertext)	title	无描述	字符串	可选

See also

• {{mvar}} which makes the argument italic and formats as mathematics
• {{math}} which formats its argument as mathematics
• {{bigmath}}, the same as {{math}} but makes it bigger