How to define the number of decimal places in the settings for a Float?

Hi there!

I'm developing a datafield where the user can set their Efficiency Threshold in the settings as Float with precicion=2.

When - for example - set 0.80 then it's accepted and stored. But when I visit the settings afterwards, the value is shown as float with many decimal places which do not exactly match the given value.

Can I set the precision for settings floats?

Here are the basics in my code:

And here is a screenshot of my Connect IQ mobile app:

jim_m_58 11 hours ago

32 bit floats are kind of odd. in that not all values can be saved in 32 bits so some may be displayed a bit oddly

flocsy🤠 8 hours ago

either use fixed points (i.e use Number, and save the value *100) or save it as a string. Though I suspect that if you eventually convert it to Float, then you'll probably have the same problem. You could maybe do the whole math in fixed point though.

flowstate 3 hours ago in reply to jim_m_58

jim_m_58 said:
32 bit floats are kind of odd. in that not all values can be saved in 32 bits so some may be displayed a bit oddly

This isn't unique to 32-bit floats at all, but it's a characteristic of all floating-point numbers, including 64-bit double-precision floating-point numbers (Double in Monkey C)..

For example, js uses 64-bit floats for its Number data type:

> 10.8/100
0.10800000000000001

It would be fair to say that the problem is even more pronounced with 32-bit floats vs 64-bit floats though.