Fyrimynd:Rnd/doc
 | Hetta er ein dokumentatión undirsíða til Fyrimynd:Rnd. Hon inniheldur kunning um nýtsluna, bólkar og um annað innihald, ið ikki er við í uppruna fyrimynd síðuni. |
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Henda fyrimynd verður nýtt á nógvum síðum. Fyri at sleppa undan stórum órógvi og óneyðugum server load, so eiga allar broytingar til hesa fyrimynd fyrst at verða royndar í /sandbox ella /testcases subpages, ella á tínum egnu brúkarasíðum. Tá ið tú hevur sæð, hvussu broytingar tínar síggja út á einari royndarsíðu, so kunnu broytingarnar goymast á hesi síðu við bert einari rætting. Vinarliga umhugsa at kjakast um ætlaðar broytingar á kjaksíðuni áðrenn tú gert broytingar her. |
 | Uses Lua: |
Usage
rættaThis template rounds parameter 1 by parameter 2 decimal places (goes the other way for negative rounding) and includes trailing zeros.
- {{
rnd|54.376|2}} gives 54,38 - {{
rnd|54.376|-1}} gives 50 - {{
rnd|68.4273E12|-10}} gives 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:
- {{
rnd|2.0004|3}} gives 2,000- whereas {{
#expr:2.0004 round 3}} gives 2
- whereas {{
- {{
rnd|0.000020004|7}} gives 000 - {{
rnd|0|8}} gives 0,00000000 - {{
rnd|154268|-3}} gives 154.000 - {{
rnd|154568|-3}} gives 155.000 {{rnd|1200004|-1}}→ 1.200.000- whereas
{{#expr:1200004round-1}}→ 1200000, even though{{#expr:1300004round-1}}→ 1300000 (see m:Help:Format produced by expr)
- whereas
{{rnd|1300004|-1}}→ 1.300.000{{rnd|4.1e6|9}}→ 4.100.000,000000000{{rnd|4.1e6|10}}→ 4.100.000,0000000000{{rnd|1542689271|-7}}→ 1,54×109{{rnd|1542689271|2}}→ 1,54268927100×109{{rnd|7e9|-9}}→ 7×109{{rnd|-123|1}}→ −123,0{{rnd|-1200007|-2}}→ −1.200.000{{rnd|-1234567899|-7}}→ −1,23×109
As with #expr, the total number of significant digits is not more than 14:
{{rnd|1234567890.123456789|10}}→ 1,2345678901235×109{{rnd|123456789.0123456789|10}}→ 123.456.789,01235{{rnd|.0001234567890123456789|20}}→ 0,00012345678901235
Internal details
rættaThe markup-based version of Template:rnd uses three subtemplates:
- {{rnd/-}} — for trailing zeros
- {{rnd/e+}} — for scientific notation for numbers greater than or equal to 109 or less than or equal to −109
- {{rnd/e−}} — for scientific notation for numbers greater than −10−4 and less than 10−4 but not equal to zero
The Lua-based version of {{rnd}} uses Module:Math and always has an expansion depth of 3. However, the markup-based version has an expansion depth of 9–15, which depends on the size of the numbers (integer results use depth 9, decimals use depth 12), where astronomical numbers can hit expansion depth of 15 levels, for {{rnd|56.44e33|-32}} → 5.64 × 1034.
TemplateData
rættaRnd
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.
| Parameter | Description | Type | Status | |
|---|---|---|---|---|
| number | 1 | The number to be rounded | Number | required |
| decimal places | 2 | The number of decimal places, if negative the number is rounded so the last (parameter 2) digits are zero | Number | required |
See also
rætta