**Rational Numbers**

If the rational number mode is selected (), or

` OPTION ARITHMETIC RATIONAL`

is written in a program unit, calculation becomes rational.

Rational numbers are outputted as a form of a improper fraction, but this form cannot be used for inputs or datum.

Rational numbers can be outputted as a decimal fraction by use of PRINT USING, whereas PRINT USING can deal at most 1000 digits.

The base for a power operation is limited to an integer of -2147483647 to 2147483647.

Any irrational functions such as SQR and trigonometric, exponential，or logarithmic functions are not available.

<Remarks>

Line breaks may be inserted in a numerals written to the text window at every about 3000 digit. This is due to a specification of MS-Windows. To avoid this, write to a file.

Ref. Overview of Files