Template:Rnd/doc

Usage
This template rounds to  decimal places (goes the other way for negatives) and includes trailing zeros. Scientific notation is used for numbers greater than or equal to 1, or less than 1.

Compare: As with #expr, the total number of significant digits is not more than 14:
 * gives 2.0004
 * whereas gives
 * gives 0.000020004
 * gives 0
 * gives 154268
 * whereas, even though  (see m:Help:Format produced by expr)
 * whereas, even though  (see m:Help:Format produced by expr)

Internal details
The template 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