Template:Ifdef
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Template documentationThis documentation is 
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Note to editors: Please don't categorize this template by editing it directly. Instead, place the category in its documentation page, in its "includeonly" section.
transcluded from Template:Ifdef/doc. (Edit | history)Note to editors: Please don't categorize this template by editing it directly. Instead, place the category in its documentation page, in its "includeonly" section.
This template provides branching without Extension:ParserFunctions for simple "if defined then do" statements without else part. It is the opposite of Template:Ifndef.
See Template:Ifwpc for an overview of results, and comparisons.
Usage
{{ifdef|value|result}}
yields result if value isn't blank.
It uses the code {{{1{{{1|}}}|{{{2|}}}}}}.
Examples
| Code | Result |
|---|---|
{{ifdef|x|y}}
|
y |
{{ifdef||y}}
|
|
{{ifdef|2=y}}
|
y |
{{ifdef|x}}
|
|
{{ifdef|}}
|
|
{{ifdef}}
|
Substitution
Convenient of the parameter default mechanism is that substitution works also, without any extra code.