Patrom:Rnd/doc

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Usage[kemmañ ar vammenn]

This 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
  • {{rnd|0.000020004|7}} gives 2,00×10−5
  • {{rnd|0|8}} gives 0,00000000
  • {{rnd|154268|-3}} gives 154 000
  • {{rnd|1200004|-1}} → 1 200 000
  • {{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[kemmañ ar vammenn]

The markup-based version of Template:rnd uses three subtemplates:

  • (tl) — for trailing zeros
  • (tl) — for scientific notation for numbers greater than or equal to 109 or less than or equal to −109
  • (tl) — 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.

See also[kemmañ ar vammenn]