What is the problem with this?:
BigDecimal(“4”).sqrt(10)
=> #<BigDecimal:9c5a734,‘0.1999999999 9999999998 66602351E1’,36(36)>
BigDecimal(“4”).sqrt(11)
=> #BigDecimal:9c6457c,‘0.2E1’,9(45)
sqrt's parameter should be the precision, and for this operation 4
should suffice (or not?). Documentation on BigDecimal.sqrt is a tad bit
suboptimal, it states that n for sqrt(n) is optional, however it is
a must.
BigDecimal(“4”).sqrt
ArgumentError: wrong number of arguments(0 for 1)
from (pry):35:in `sqrt’
Why BigDecimal.sqrt is imprecise and why do I have to set a 11 digit
precision to get the proper value for sqrt(4)?