Last modified: 2008-08-11 20:20:21 UTC

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Bug 11156 - Formatnum and expr gives erroneous calculation
Formatnum and expr gives erroneous calculation
Product: MediaWiki extensions
Classification: Unclassified
ParserFunctions (Other open bugs)
All All
: Normal normal (vote)
: ---
Assigned To: Nobody - You can work on this!
Depends on:
  Show dependency treegraph
Reported: 2007-09-02 16:57 UTC by Joanjoc
Modified: 2008-08-11 20:20 UTC (History)
1 user (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Description Joanjoc 2007-09-02 16:57:10 UTC
This error ocurrs in wikipedias using comma as a decimal separator according to the wiki's default locale, like in catalan wikipedia. 

Tthe formatnum magicword almost follows the wiki locale, but the parser function #expr: use the dot as a decimal separator. This differences results in erroneous calculus in some templates. There's a set of examples at;
Comment 1 Jelte (WebBoy) 2008-08-11 20:20:21 UTC
You should use only English numbers without thousand separator (like 1000000.45) in #expr and formatnum without R.

To transform numbers from a local number ( like 1.000.000,45 ) to an English number without thousand separator, use {{formatnum: number |R}} (note the R):

{{formatnum: 1.000.000,45 |R}} => 1000000.45

Therefore, to multiply a local number with 10, and output a local number, you should use:

{{formatnum: {{#expr: {{formatnum: 5.199,75 | R }} * 10 }} }}

Output: 51.997,5

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