# ढाँचा:Val/doc

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This template is used to easily present values in scientific notation, including uncertainty and/or units, as prescribed by Wikipedia's Manual of Style.

## Introduction

Val specializes in numeric values, especially those with scientific notations, uncertainty notations, and those with measurement values with physical units. Because these expressions are covered by the Manual of Style, Val provides the stylized output for you, and keeps them from wrapping across lines.

Express a numeral:

• {{val|123456.78901}}value, formatted with gaps: १२३४५६.७८९, or with |fmt=commasढाँचा:Val/delimitnum/commas00
• {{val|number|number}}value ± uncertainty, like
• {{val|number|(number)}}value(uncertainty), like
• {{val|number|number|number}}value +uncertainty
−uncertainty
like

Express a measurement value: {{val|4|ul=m2}}. The m2 is a "unit code" that Val uses to lookup the link to the unit's article, and the formatting of the unit symbol. Val links the units to the page it has on file for them. See {{Val/list}}.

There are a large number of unit codes that Val understands and keeps "up to code". A unit code is the just abbreviated unit name, but these can get quite involved for a compound or composite unit, with "multipliers" or "dividers". See Module:Val/units.

Some unit-code flexibility is provided by having four parameters to work the unit-code system: whether to link one or not, (see Overlinking), and whether to link the numerator or denominator of a unit ratio separately.

• {{val|number|ul=unit code}}number symbol, such as ९.८km2
• {{val|number|u=unit code}}number symbol, such as ९.८km2
• {{val|number|u=unit code|upl=unit code}}number symbol/symbol, such as ९.८galmin
• {{val|number|ul=unit code|up=unit code}}number symbol/symbol, such as ९.८parsecyear

To bypass the unit code system, if |u= does not recognize your unit code, it will accept any wikitext and render it as usual.

• {{val|5.4|u=[[kg]]&sdot;[[meter|m]]/s<sup>2</sup>}}५.४kgm/s2
• {{val|7.6|u=[[metre per second squared|m/s<sup>2</sup>]]}}७.६m/s2

See Module:Val/units for how to add units to the unit code system.

Sometimes a number and unit code is not enough. A prefix or suffix are also available, |p= and |s=.

• {{val|7600|u=C&sdot;Ga|p=>|s=<}}>७६००C⋅Ga<
• {{val|7600|u=C|p=<span style="color:green"><sup>|s=</sup></span>}}६००C

See {{val/testcases}} to learn the val parameters by an example. It is comprehensive, and there are over 100 examples.

## Arguments

Val takes three unnamed parameters. The first is always the numeric value. When the second and third are numbers they become the various uncertainty notations, but the second unnamed parameter can also serve to grammatically join the first and third numbers.

Val clears surrounding spaces in its unnamed parameters.

 1st or |1= A number in decimal point notation or in e notation. The main basis of the Val expression. {{val|1234567.1234567}} → १२३४५६७.१२३४५६७ {{val|.1234}} → ०.१२३४                    (adds the zero) {{val|+1234}} → १२३४                     (displays the plus) {{val|-1234}} → −१२३४                     (replaces the hyphen-minus with a minus sign) {{val|12e34}} → ०.अभिव्यक्ति त्रुटि: अज्ञात शब्द "inf"।                (E notation) |fmt= By default, numbers are formatted with gaps separating groups of three digits in both integer and fractional part. However, by default, four-digit integers are not formatted; use |fmt=gaps to force gaps. Use |fmt=commas to delimit the integer part of the number with commas. Use |fmt=none for no formatting (no gaps or commas). {{val|1234567.1234567}} → १२३४५६७.१२३४५६७ {{val|1234567.1234567|fmt=commas}} → ढाँचा:Val/delimitnum/commas00 {{val|1234}} → १२३४ {{val|1234|fmt=gaps}} → १२३४ {{val|1234.5}} → १२३४.५ {{val|1234.5|fmt=none}} → ढाँचा:Val/delimitnum/none00 |end= Put something at the end of the main number (before anything else that might follow). {{val|11|end=}} → ११ {{val|11|22|end=}} → ११±२२ {{val|1111|(22)|end=}} → ११११(22) {{val|11|22|33|end=}} → Error in {{val}}: third argument is not negative. {{val|11|ul=m/s|end=}} → ११m/s 2nd or |2= Uncertainty in either format. {{val|11|22}} → ११±२२ {{Val|11|(22)}} → ११(22) A conjunction to join two numbers. Useful for ranges, grammatical output, etc. {{val|11|-|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|–|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|,|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|by|33|e=9}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|and|33|end=\$}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|or|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|to|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|x|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|×|33}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. {{val|11|/|33|ul=m/s}} → Error in {{val}}: second argument is not a valid number or requires too much precision to display. Note that for dashes or x's, the various kinds all obtain one properly styled output. 3rd or |3= Asymmetric uncertainty. {{Val|11|22|33}} → Error in {{val}}: third argument is not negative. |errend= or |+errend= and |-errend= Appends something after an uncertainty. {{val|11|22|errend=}} → ११±२२ {{val|11|22|33|+errend=<+Errend>|-errend=<−Errend>}} → Error in {{val}}: third argument is not negative. |u= or |ul= The unit code. Val adds a space and the unit. |ul= Link the unit. |u= Don't link the unit. Also accepts wiki markup in lieu of a unit code. {{val|11|ul=m}} → ११m |up= or |upl= A unit code, but instead of a space Val adds a slash and the unit, a "per" unit (the denominator), to form a ratio. |upl= Link the per unit. |up= Don't link the per unit. The ratio can be of two unit codes, or a prefix and a unit code. Val will add parentheses to disambiguate, if a unit code has a dot or a slash. {{Val|11|ul=J/C|upl=F/m}} → ११J/CF/m {{Val|11|upl=acre|p=\$}} → {{Val|11|ul=km/s|upl=Mpc}} → ११km/sMpc {{Val|11|ul=kg.m|upl=s-2}} → ११kg.ms-2 |p= Prefix the entire Val expression. Non-spaced, but accepts markup. {{Val|11|22|ul=m/s|p=}} → ११±२२m/s {{Val|11|22|ul=m/s|p= }} →  ११±२२m/s |s= Suffix the entire Val expression. Non-spaced, but accepts markup. {{Val|11|22|ul=m/s|s=}} → ११±२२m/s {{Val|11|22|ul=m/s|s= }} → ११±२२m/s  |e= Exponent. Val alternatively accepts e notation in the first parameter; these are mutually exclusive (see "1st" argument above). {{Val|11|22|33|e=11}} → Error in {{val}}: third argument is not negative. {{Val|11e11|22|33}} → Error in {{val}}: third argument is not negative. |long scale= Usually a unit is the short ton and billion means १×१०९. But there are long versions of these units and others. Use |long scale=on to assign your unit to the long scale instead. The unit code's link will change and it will sort differently in tables. "See Long and short scales". |nocategory= If set to any value, errors in the use of this template will not cause the page to be added to the Pages with incorrect formatting templates use category. This is useful for documentation and test pages that do not need to be fixed.

## Errors

There is strict checking on the validity of arguments; any incorrect use will result in an error, which is displayed using {{FormattingError}}. Pages that contain incorrect use of this template will show up on Category:Pages with incorrect formatting templates use.

Val checks for unsupported parameters and gives a relatively subtle warning if found. See tracking category to track any of these improper usages on existing on the wiki. Hold the mouse over "warning" to see details. Here is what warnings look like:

• {{val|1.23|exp=6|u=m/s}}१.२३m/s
• {{val|1.23|us=kbit/s}}१.२३
• {{val|1.23|.05|.04|.03|u=m/s}}Error in {{val}}: third argument is not negative.

## Format of numbers

{{Val}} produces formatting compliant with Wikipedia's Manual of Style.

The MOS recommends that numbers either be delimited using thin spaces either side of the decimal, or commas to the left and no delimiters to the right. Articles should be consistent with respect to the style of delimiting. The template defaults to the former style, this can be adjusted using |fmt= (see above).

## Sorting

The sort key for each sortable unit is visible at Template:Val/list.

Here is a live example showing the minimal markup for a sortable table:

{| class="sortable"
! Val sort test
! In base unit
|-
| {{val|3|ul=  Mm }}
| {{val|3000000|u=m}}
|-
| {{val|4e6|ul= m }}
| {{val|4000000|u=m}}
|-
| {{val|1|ul=  km }}
| {{val|1000|u=m}}
|-
| {{val|5e3|u=  m }}
| {{val|5000|u=m}}
|-
| {{val|2|u=    m }}
| {{val|2|u=m}}
|}
Click to sort ↓
Val sort test In base unit
Mm ००००००मी
००००००.m ००००००मी
km ०००मी
०००.मी ०००मी
२मी २मी

A sort value relates to a Val expression as follows.

1. The numeric value is a starting point.
2. If the unit has an SI Prefix, that order of magnitude is applied.
3. The value of the unit from its own system of units is applied.
4. If the unit is composite, each subunit is multiplied or divided per their dimension.
5. The result is passed to {{ntsh}} which applies a normalization formula.
6. The output of {{ntsh}} is added (behaviorally only, i.e. "hidden") into the table as usual, via the data-sort-value attribute of a table.

## More example expressions

### Number

{{val|1234567.1234567}}२३४५६७.१२३५६७
.{{val|  1234567.1234567   }}. → .Expression error: Unexpected number..
{{val|.1234567|fmt=commas}}ढाँचा:Val/delimitnum/commas00
{{val|+1234567|fmt=commas}}ढाँचा:Val/delimitnum/commas01
{{val|-1234567}}−१२३४५६७

### Uncertainty

{{val|1.234|0.005}}१.२३४±०.००५
{{val|1.234|0.005|e=3}}(१.२३४±०.००५)×१०
{{val|1.234|+0.005|-0.006}}१.२३४+०.००५
−0.००६

{{val|1.234|(5)}}१.२३४(5)

### Units

{{val|1.234|u=m}}१.२३४मी
{{val|1.234|u=m2}}१.२३४m2
{{val|1.234|ul=m}}१.२३४m
{{val|123.4|ul=USgal}}१२३.४US gal
{{val|12.34|ul=mpgimp}}१२.३४mpgimp

{{val|12.34|u=deg}}१२.३४°deg
{{val|1.234|0.005|u='}}१.२३४′±०.००५′'
{{val|1.234|+0.005|-0.006|u="}}१.२३४″+०.००५″
−0.००६″
"

{{val|1.234|u=%}}१.२३४%%
{{val|1.234|end=&nbsp;[[m/s]]}}१.२३४ m/s

{{val|12.34|u=degC}}१२.३४°C
{{val|12.34|u=K}}

### Exponents

{{val|1.234e5|ul=m}}१२३४००.m
{{val|1.234|e=5|ul=m}}१.२३४×१०m

{{val|1.234e7|0.056}}१२३४००००.±०.०५६
{{val|1.234|0.056|e=7}}(१.२३४±०.०५६)×१०

{{val|1.23456e-9|+0.00007|-0.00008|ul=m/s}}०.अभिव्यक्ति त्रुटि: अनपेक्षित < सञ्चालक।+०.०००
−0.०००
m/s

{{val|1.23456|+0.00007|-0.00008|e=-9|ul=m/s}}१.२३४+०.०००
−0.०००
×१०−९m/s

{{val|1.234e7|0.056|ul=psi}}१२३४००००.±०.०५६psi
{{val|1.234|0.056|e=7|ul=psi}}(१.२३४±०.०५६)×१०psi

{{val|1.234e-2|(5)}}०.अभिव्यक्ति त्रुटि: अनपेक्षित < सञ्चालक।(5)
{{val|1.234|(5)|e=-2}}१.२३४(5)×१०−२

### Prefix/suffix

{{val|12.34|p=Δ&nbsp;}}Δ १२.३४
{{val|12.34|u=%|p=≅}}≅१२.३४%%
{{val|12.34|0.25|s=%}}१२.३४±०.२५%

### Numerator/denominator

{{val|1.234|e=7|ul=W|up=m2}}१.२३४×१०Wm2

### Repeating digits

{{val|1.2|end={{overline|34}}|e=7|ul=W|up=m2}}१.२34×१०Wm2

### Even more examples

See the testcases at {{val/testcases}}.

## FAQ and comments

Q. Why should I use Val?
A1. Val formats numbers:
A2. Val preserves spacing:
• It makes sure the value does not wrap at the end of a line, so that it can always be read as a single value on one line in the text.
• It spaces the various parts of the value where they should be.
A3. Configuring Val gives you your own code for automating the markup for, and a link to, any units in the entire Encyclopedia.
A4. Val helps make Wikipedia more consistent. It adheres to the Wikipedia Manual of Style for numbers. Updates to the MoS can be applied to this template and result in automatic modification on values that use it. All this makes sure all values on all pages have the same look and feel because they will all use the same spacing, font size, positioning, etc, and makes updating and checking by the bots easier because they can recognize a value for what it is.
Q. Why not use [itex]?
A. For the same reasons HTML might be preferred over TeX:
• Because the font in math tags differs both in face and size from the prose, which can disturb the layout of a page when used inline with the prose.
• You cannot cut and paste a bitmap image rendered by the LaTeX.
• Images are slower to load and use more bandwidth, which is especially bad for the mobile version of Wikipedia.
• [itex] does not automatically easily align to the Manual of Style for numbers.
Q. Are there any known issues with Val?
A1: This template is now a new Lua module as of Aug 6, 2015. Technically, there is no good reason not to try Val.
A2. Issues are solved rapidly by an active set of responsive template coders. See the talk page.
Q. How should I use Val?
A1. Val probably already has your unit on its current list. If not, add your own unit there.
A2. To avoid overlinking, switch from |ul= to |u= and from |upl= to |up=.
A3. Any time you have a unit to link or a table to sort, Val already setup with that unit's link and sorting value.
A3. Use Val along with {{Convert}}. See how to add units to Convert.
A4. Where consistent styling of long list articles, with many hundreds or thousands of numbers or units is needed.

## TemplateData

यो ढाँचातथ्याङ्कको दस्तावेज दृश्यसम्पादक र अन्य उपकरणहरूद्वारा प्रयोग गरीन्छ; यो ढाँचाको मासिक मापदण्ड उपयोग रिपोर्ट हेर्नुहोस्।

Valको ढाँचातथ्याङ्क

This template is used to easily present values in scientific notation, including uncertainty and/or units, as prescribed by Wikipedia's Manual of Style.

Template parameters

This template prefers inline formatting of parameters.

Parameterविवरणप्रकारस्थिति
Number1

A number in decimal point notation or in e notation. The main basis of the Val expression.

उदाहरण
-12.12345e9
Stringrequired
Uncertainty2

no description

Stringवैकल्पिक
Asymmetric uncertainty -3

no description

Stringवैकल्पिक
Formatfmt

By default, numbers are formatted with gaps separating groups of three digits in both integer and fractional part. However, by default, four-digit integers are not formatted; use "gaps" (without quotes) to force gaps. Use the value "commas" (without quotes) to delimit the integer part of the number with commas. Use "none" (without quotes) for no formatting (no gaps or commas).

उदाहरण
commas
Stringवैकल्पिक
Endend

Put something at the end of the main number (before anything else that might follow).

Stringवैकल्पिक
Unitu

The unit code. A space and the unit will be added after the number.

उदाहरण
m
Stringवैकल्पिक
Unit – wikilinkedul

The unit code that will be wikilinked to a page with information about the unit. A space and this unit will be added after the number.

उदाहरण
m
Stringवैकल्पिक
Unit to be prefixed with a slash (/)up

A unit code, but instead of a space, the template adds a slash and the unit, a "per" unit (the denominator), to form a ratio.

उदाहरण
s
Stringवैकल्पिक
Unit to be prefixed with a slash (/) – wikilinkedupl

A wikilinked unit code, but instead of a space, the template adds a slash and the unit, a "per" unit (the denominator), to form a ratio.

उदाहरण
s
Stringवैकल्पिक
Prefixp

Prefix for the entire Val expression. Non-spaced, but accepts markup.

Contentवैकल्पिक
Suffixs

Suffix for the entire Val expression. Non-spaced, but accepts markup.

Contentवैकल्पिक
Exponente

Val alternatively accepts e notation in the first parameter; these are mutually exclusive (see the Number parameter).

उदाहरण
9
Numberवैकल्पिक
errenderrend

no description

Unknownवैकल्पिक
44

no description

Unknownवैकल्पिक
55

no description

Unknownवैकल्पिक