Wikipedia>Jonesey95: comment deliberate error

2021-08-14T15:28:42Z

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== Usage ==

:<nowiki>{{pars|s=200%|Content-inside-parentheses}}</nowiki> will
::(1) Places ( ) around the content: (Content-inside-parentheses)
::(2) scales their size to 200%
::* You can also use the units px/em/pt/%
::(3) Add small spaces immediately after ( and immediately before )
:{{pars|s=200%|Content-inside-parentheses}}

This template may be used to enclose text between two parentheses.
It adds padding (of width 0.1 em) on each side inside the parentheses.
This template has the following parameters
* 1 (positional parameter) - the text that goes inside of the parentheses.
* s or 2 - "s" stands for "size". size=SIZE（px/em/pt/%） If s=100% then the size of the parentheses is not changed (i.e. the parentheses have their usual size). If s=200% (resp. s=50%) then the parentheses are twice (resp. half) their usual size.
** You may use the positional parameter 2 instead of s (e.g. you may use 2=50% in place of s=50%).
** If neither the parameter s nor 2 is assigned a value then the size of the parentheses is not changed (i.e. the parentheses have their usual size) ''and'' no call to the {{tl|font}} template is made.

== Examples ==

;No arguments passed

<pre>
This call {{math|{{pars}}}} produces parentheses.
</pre>
:This call {{math|{{pars}}}} produces parentheses.

;No resizing used and content is passed

<pre>
If {{math|{{pars|X}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|X}} < 0}}, then {{mvar|X}} is negative.

;Parentheses are resized and no content passed

<pre>
If {{math|{{pars|2=210%}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|2=210%}} < 0}}, then {{mvar|X}} is negative.

<pre>
If {{math|{{pars|s=210%}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|s=210%}} < 0}}, then {{mvar|X}} is negative.

;Content is resized but parentheses aren't

<pre>
If {{math|{{pars|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.

;Parentheses are resized but content isn't

<pre>
If {{math|{{pars|2=210%|X}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|2=210%|X}} < 0}}, then {{mvar|X}} is negative.

<pre>
If {{math|{{pars|s=210%|X}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|s=210%|X}} < 0}}, then {{mvar|X}} is negative.

;Content and parentheses are resized. Using parameter s for size of parentheses.

"s" stands for "size". It indicates the new size of the parentheses relative to their usual size (e.g. s=200 produces parentheses with twice their usual size, s=100 produces the usual size, etc.).

<pre>
If {{math|{{pars|s=210%|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|s=210%|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.

;Content and parentheses are resized. Using "2" in place of "s".

Here we indicate the size of the parentheses (as a percentage) by using parameter number 2 rather than the named parameter '''s'''.

<pre>
If {{math|{{pars|2=210%|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.
</pre>
<pre>
If {{math|{{pars|2=210%|1={{large|X}}}} < 0}}, then {{mvar|X}} is negative.
</pre>

Both of the above lines produce identical output, which is:

:If {{math|{{pars|2=210%|1={{large|X}}}} < 0}}, then {{mvar|X}} is negative.

;Content and parentheses are resized. Passing arguments by their position.

Here we indicate the size of the parentheses (as a percentage) by using parameter position number 2 rather than the named parameter '''s'''.

<pre>
If {{math|{{pars|{{large|X}}|210%}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|{{large|X}}|210%}} < 0}}, then {{mvar|X}} is negative.

This is equivalent to the following two lines:

<pre>
If {{math|{{pars|1={{large|X}}|2=210%}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|1={{large|X}}|2=210%}} < 0}}, then {{mvar|X}} is negative.

<pre>
If {{math|{{pars|{{large|X}}|2=210%}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|{{large|X}}|2=210%}} < 0}}, then {{mvar|X}} is negative.

'''WARNING''': in the following line, 1 is first set to <nowiki>{{large|X}}</nowiki> and then because "210" is the '''''first''' unlabelled'' positional argument, the value of 1 is overwritten and replaced by "210" (which is why 210 appears inside the parentheses) while the positional argument 2 is never assigned a value (which is why the parentheses have their usual size). This is a documented quirk of Wikipedia templates that could occur with many templates that take two or more arguments.

<pre>
If {{math|{{pars|1={{large|X}}|210%}} < 0}}, then {{mvar|X}} is negative.
</pre>
:If {{math|{{pars|210%}} < 0}}, then {{mvar|X}} is negative.
'''WARNING''': the following is '''''NOT''''' valid since it would attempt to place the text "210" inside the parentheses (this is because the positional parameter 1 is assigned the value 210) and then attempt to pass {{large|X}} as the percentage number to the template {{tl|font}} (this is because the positional parameter 2 is assigned the value <nowiki>{{large|X}}</nowiki>) even though it is not a valid number.

<pre>
If {{math|{{pars|210%|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.
</pre>

It results in the following ill-formed output:

:If {{math|{{pars|210%|{{large|X}}}} < 0}}, then {{mvar|X}} is negative.

== See also ==

* {{tl|abs}}
* {{tl|bra-ket}}
* {{tl|math}}
* {{tl|norm}}
* {{tl|pipe}}
* {{tl|langle}} and {{tl|rangle}}

{{Math templates|notation}}

<includeonly>{{sandbox other||

[[Category:Mathematical formatting templates]]

}}</includeonly>

Template:Pars/doc - Revision history

Wikipedia>Jonesey95: comment deliberate error