ceil(n)
Instance Public methods
Return the smallest integer greater than or equal to the value, as a BigDecimal.
BigDecimal('3.14159').ceil #=> 4
BigDecimal('-9.1').ceil #=> -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').ceil(3) #=> 3.142
BigDecimal('13345.234').ceil(-2) #=> 1