round(n, mode)
Instance Public methods
Round to the nearest 1 (by default), returning the result as a BigDecimal.
BigDecimal('3.14159').round #=> 3
BigDecimal('8.7').round #=> 9
If n is specified and positive, the fractional part of the result has no more than that many digits.
If n is specified and negative, at least that many digits to the left of the decimal point will be 0 in the result.
BigDecimal('3.14159').round(3) #=> 3.142
BigDecimal('13345.234').round(-2) #=> 13300.0
The value of the optional mode argument can be used to determine how rounding is performed; see ::mode.
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