Template:Ifndef

Template documentation

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This template provides branching without Extension:ParserFunctions for simple "if defined then void else do" statements with blank then part. It is the opposite of Template:Ifdef.

Usage

{{Ifndef|value|result}} yields result  if value  is blank.

It uses the code {{{2{{{1|}}}|}}}

See Template:Ifwpc for an overview of results, and comparisons.

Examples

Code	Result
{{Ifndef|x|y}}
{{Ifndef||y}}	y
{{Ifndef|2=y}}	y
{{Ifndef|x}}
{{Ifndef|}}
{{Ifndef}}

Substitution

Convenient of the parameter default mechanism is that substitution works also, without any extra code.