The scope of precision math for exact-value operations includes
the exact-value data types (
and integer types) and exact-value numeric literals.
Approximate-value data types and numeric literals still are
handled as floating-point numbers.
Exact-value numeric literals have an integer part or fractional
part, or both. They may be signed. Examples:
Approximate-value numeric literals are represented in scientific
notation with a mantissa and exponent. Either or both parts may be
Two numbers that look similar need not be both exact-value or both
approximate-value. For example,
2.34 is an
exact-value (fixed-point) number, whereas
2.34E0 is an approximate-value (floating-point)