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Using my own fp multi-precision engine, fp Plugin for REALbasic adds three new data types. They are:

BigInteger
BigFloat
BigComplex

Except for available memory, there is no limitation on the size of a BigInteger. So you can multiply a 100 digit integer by another 100 digit integer giving the exact 200 digit integer.

BigFloat is a multi--precision floating point number. You can set both the internal precision and the decimal output precision for BigFloat, with no limitation except for available memory. It might take awhile, but you can now calculate pi in a REALbasic program to a million decimal places, or more. The power of 10 for BigFloat can range from about -600,000,000 to +600,000,000 as compared to -308 to +308 for a Double.

BigComplex is composed of two BigFloats, so it uses BigFloat precision.

fp Plugin itself allows you to construct programs which can handle the three new data types much like doubles and integers are handled. To a large extent the new data types can be freely used with the +, -, *, and / operators, and can be used in comparisons. And most of REALbasic's functions have been overloaded to take the new data types, where it makes sense to do so.

The added 4th data type is ComplexVector, which holds an array of complex numbers. Additional functions use the Laguerre method to find for a polynomial all its roots (complex or real) to any chosen precision.