模板:Round
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Usage
This template rounds parameter 1 by parameter 2 decimal places (goes the other way for negative rounding) and includes trailing zeros.
{{Round|54.376|2}}→ 54.38{{Round|54.376|-1}}→ 50{{Round|68.4273E12|-10}}→ 6.843×1013
For example, rounding by 1 gives 1 decimal digit, rounding by 0 gives integers, or rounding by -2 gives the amount in hundreds. Scientific notation is displayed for numbers greater than or equal to 1×109, or less than 1×10−4.
Examples
{{Round|2.0004|3}}→ 2.000- {{expr:2.0004 round 3}} → 2
{{Round|0.000020004|7}}→ 000{{Round|0|8}}→ 0.00000000{{Round|154268|-3}}→ 154,000{{Round|154568|-3}}→ 155,000{{Round|1200004|-1}}→ 1,200,000- whereas {{expr:1200004round-1}} → 1200000, even though {{expr:1300004round-1}} → 1300000 (see m:Help:Format produced by expr)
{{Round|1300004|-1}}→ 1,300,000{{Round|4.1e6|9}}→ 4,100,000.000000000{{Round|4.1e6|10}}→ 4,100,000.0000000000{{Round|1542689271|-7}}→ 1.54×109{{Round|1542689271|2}}→ 1.54268927100×109{{Round|7e9|-9}}→ 7×109{{Round|-123|1}}→ −123.0{{Round|-1200007|-2}}→ −1,200,000{{Round|-1234567899|-7}}→ −1.23×109
As with #expr, the total number of significant digits is not more than 14:
{{Round|1234567890.123456789|10}}→ 1.2345678901235×109{{Round|123456789.0123456789|10}}→ 123,456,789.01235{{Round|.0001234567890123456789|20}}→ 0.00012345678901235
- The second parameter, precision, should be an integer. Non-integer may give unexpected result.
{{Round|1.234567}}→ 1{{Round|1.234567|2}}→ 1.23{{Round|1.234567|2.3}}→ 1.2329205947231{{Round|1.234567|2.7}}→ 1.2350673729657
TemplateData
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TemplateData for Round
Rounds (parameter 1) by (parameter 2) decimal places, and formats. Scientific notation is used for numbers greater than 1×10^9, or less than 1×10^−4.
| 参数 | 描述 | 类型 | 状态 | |
|---|---|---|---|---|
| number | 1 | The number to be rounded | 数字 | 必需 |
| decimal places | 2 | The number of decimal places, if negative the number is rounded so the last (parameter 2) digits are zero | 数字 | 必需 |
Maintenance categories
See also
- {{Rounded calculation}}
- {{Significant figures}}
- {{Roundup}}
- {{Rounddown}}