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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.


{{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.


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


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