Help:Conditional expressions
Sign in to saveAlso known as Parser Functions, expr, if, ifeq, iferror, ifexist, ifexpr, rel2abs
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It is catalogued under topics including MediaWiki Help and ParserFunction errors.
Its subject is documented across 26 Wikipedia language editions.
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Encyclopedic overview
This page describes how to use various parser functions to display different results based on detected conditions in a page or template.
Here is a quick summary of these functions in terms of how they treat their input (the function names are linked to more detailed descriptions of them found below on this page):
Excerpted from Wikipedia’s “Help:Conditional expressions” article, available under the CC BY-SA 4.0 licence.
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