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This category collects pages that use theformatnumparser function with a non-numeric or incorrectly formatted value, e.g.{{formatnum:foo}} or{{formatnum:12,345}}.
Ways to fix or work around this error inside template code:
- If
formatnum is being applied to a string that includes both a number and words, change it to wrap just the number. Example:{{formatnum:{{{var}}} dollars}} →{{formatnum:{{{var}}}}} dollars - Another way to work around invalid input is to remove commas from the input like this:
{{formatnum:{{replace|{{{var}}}|,|}}}}. Note that input using commas as decimal separators, in contravention ofMOS:DECIMAL, will cause formatnum to produce invalid values. To fix the problem, use a full stop (period) as a decimal separator. - A limited way to work around invalid input in templates is to use{{digits}}, e.g.
{{formatnum:{{digits|{{{votes}}}}}}}. This works only for whole numbers and will produce incorrect results for input containing decimal points or other non-numeric characters.
Ways to fix this error in articles:
- When additional text or references exist in a template parameter that expects only numbers, find a way to move the additional text outside the template or into a different parameter. For example:
- Currency templates like{{CAD}} or{{US$}} take only numeric input. Use
{{US$|123}}{{nbsp}}million instead of{{US$|123 million}} - The
|population_total= parameter in{{Infobox settlement}} should have only a number in it. Move any references to|population_footnotes=, as inthis edit.
Other:
- When
formatnum is given a negative number written with the proper U+2212 "minus sign" (instead of the commonly usedhyphen-minus key that appears on most keyboards), e.g.{{formatnum:−9000000}}, it assigns this error category; seeT237467. A workaround for this incorrect usage was applied to{{US Census population}}, which shows population declines as negative numbers. You should usehyphen-minus withinformatnum to avoid this error category and it will output the proper minus sign (seeT10327).
