Template:P1/doc
From Linux Web Expert
The templates P1, P2 and P3 simply return the first, second and third unnamed input parameter respectively. For example:
{{P1|foo|bar|baz}}returns foo{{P2|foo|bar|baz}}returns bar{{P3|foo|bar|baz}}returns baz
These templates can be used inside other templates as an alternative to the #switch parser function, to switch between outputs based on whether the input is "1", "2" or "3":
{{P{{{1}}}|output if 1|output if 2|output if 3}}
Using {{#switch}}, this syntax is equivalent to
{{{#switch:{{{1}}}|1=output if 1|2=output if 2|3=output if 3}}
except that the parser function strips whitespace between parameters whereas the templates don't.
