Template:Round/doc: Difference between revisions
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Revision as of 14:58, 3 April 2011
 | This is a documentation subpage for Template:Round. It may contain usage information, categories and other content that is not part of the original template page. |
Usage
This template rounds {{{1}}} to {{{2}}} decimal places (goes the other way for negatives) and includes trailing zeros. Scientific notation is used for numbers greater than or equal to 1×109, or less than 1×10−4.
Compare:
- {{
rnd|2.0004|3}} gives Template:Rnd- whereas {{
#expr:2.0004 round 3}} gives 2
- whereas {{
- {{
rnd|0.000020004|7}} gives Template:Rnd - {{
rnd|0|8}} gives Template:Rnd - {{
rnd|154268|-3}} gives Template:Rnd {{rnd|1200004|-1}}→ Template:Rnd- whereas
{{#expr:1200004round-1}}→ 1200000, even though{{#expr:1300004round-1}}→ 1300000 (see m:Help:Format produced by expr)
- whereas
{{rnd|1300004|-1}}→ Template:Rnd{{rnd|4.1e6|9}}→ Template:Rnd{{rnd|4.1e6|10}}→ Template:Rnd{{rnd|1542689271|-7}}→ Template:Rnd{{rnd|1542689271|2}}→ Template:Rnd{{rnd|7e9|-9}}→ Template:Rnd{{rnd|-123|1}}→ Template:Rnd{{rnd|-1200007|-2}}→ Template:Rnd{{rnd|-1234567899|-7}}→ Template:Rnd
As with #expr, the total number of significant digits is not more than 14:
{{rnd|1234567890.123456789|10}}→ Template:Rnd{{rnd|123456789.0123456789|10}}→ Template:Rnd{{rnd|.0001234567890123456789|20}}→ Template:Rnd
Internal details
The template calls Template:Rnd/b1 if the number, after rounding, is positive, Template:Rnd/b-1 if it is negative, and Template:Rnd/b0 if it is zero.
Their first parameter is the rounded number, their second the rounding parameter, and their third the value of the condition that the rounding parameter is positive.
