NonIntegral Types
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 *mmm* **E** *eee*, in which *mmm* is the mantissa (the significant digits) and *eee* is the exponent (a power of 10).