Return the number of decimal digits of precision for a FloatD.
Technically, if P is the precision for the representation, then
the decimal precision Q is the maximum number of decimal digits
such that any floating point number with Q base 10 digits can be
rounded to a floating point number with P base 2 digits and back
again, without change to the Q decimal digits.
emax
Return the maximum allowable exponent for a FloatD that is finite.
emin
Return the maximum allowable exponent for a FloatD that is finite.
fmax
Return the largest normalized FloatD that is not infinite.
fminNormalized
Return the smallest normalized FloatD that is > 0
infinity
Return a FloatD that represents positive infinity.
nan
Return a FloatD that represents a mathematically indeterminate value
(e.g. Inf - Inf, Inf / Inf).
negativeInfinity
Return a FloatD that represents negative infinity.
precision
Answer the number of bits in the mantissa. 1 + (2^-precision) = 1