Nonintegral data types are those that represent numbers with both integer
and fractional parts. The default nonIntegral type is *Float.
Floating point numbers can be subject to rounding errors. Floating point types
support fewer significant digits than *Integer but can represent
values of greater magnitude.
Floating point values can be expressed as mmmEeee, in which mmm
is the mantissa (the significant digits) and eee is the exponent (a
power of 10).