OPTION ARITHMETIC DECIMAL
lets all numbers be decimal floating point.
OPTION ARITHMETIC NATIVE
lets all numbers be double precision floating point.
The precision is about 16 digits.
Although decimal fractions may have errors, computation is fast.
The scope of OPTION ARITHMETIC statement is the Program unit where it is written.
Program units that do not deliver or receive numbers may have different OPTION ARITHMETIC.
An OPTION statement is a declarative statement, which is not an object of the control.
Original Enhancements
OPTION ARITHMETIC DECIMAL_HIGH
Decimal 1000 digits operation. (Transcendental functions have the precision of 17 digits(last digit even).)
OPTION ARITHMETIC COMPLEX
Complex numbers
OPTION ARITHMETIC RATIONAL
Rational numbers of huge digits. (irrational functions have the precision of 17 digits(last digit even).)
(Note)
If a program unit has no OPTION ARITHMETIC statement, number manipulation obeys the designate on the Option Menu - Precision