Increase precision of Evaluator Example

General
1

The xojo IDE comes an example tutorial called Evaluator that allows you to use the xojo script to evaluate mathematical expressions.
If I run 100/541 it gives me a result of 0.2217295 when in reality it is 0.22172949. That is, it rounds the last decimal for me. Is there an easy way to prevent it from rounding decimals?

Thanks

2

You can change the XojoScript to do what you want.

For simplicity the XojoScript code in Evaluator uses the Str function is used to convert the value to a String, which limits the precision. But you could change that to use Format with a format string specifying the number of decimals.

Or you could save the output back to both a String and the actual Double and then pull out the one you want. This modified sample project shows how that might work:

Evaluator2.xojo_binary_project.zip (12.8 KB)

2 Likes
3

Thanks Paul. Since DoubleValue instead of Str works fine for my needs.
I’ve also tried with Format(DoubleValue,“-###,###.################” but it does extranger things. After a double decimal 0 calculating more decimals.
I’m sticking with the option of Double value directly without a string