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Issue 17.6 ('Xojo in Cologne')
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Big Numbers and Large Numbers

How you can use the BigNumberMBS and LargeNumberMBS class in Xojo

Issue: 17.6 (November/December 2019)
Author: Stefanie Juchmes
Author Bio: Beginner
Article Description: n>No description availabl
Article Length (in bytes): 8,095
Starting Page Number: r>
Article Number: 17606
Resource File(s):

Download Icon project17606.zip Updated: 2019-11-01 12:16:02

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Excerpt of article text...

Sometimes you need numbers that offer a higher precision than the existing data types in Xojo do. You can solve this problem with large numbers and big numbers from our MBS Xojo DataTypes Plugin.

Big number

Our BigNumberMBS class has a floating point number with 320 bits, precise for over 100 digits before the decimal point!

If you compare it to a normal double value, you have five times the number of bits. Since version 16.5, this class is included in the MBS Xojo DataTypes Plugin.

For example, in Figure 1, we can calculate the following calculation with high precision with big numbers and get the correct results.

We see that the result with double values is wrong, whereas the result with big number values is correct. Well, double values have only about 15 digits of precision, so rounding errors show after the last precise digits.

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