Single DataType evaluation

Question

Hello

During a process by a 3rd party SDK, I'm getting the progress completion in percent, but not an integer, but single data type!

To check if it reached 100, I use:

If Convert.ToInt32(e.TotalPercent) = 100 Then ...

The problem is this condition will be false for 99.4026 but once it passes 99.5 like 99.54923 it will be true and I will get many true conditions until it reaches 100.

How to safely evaluate a single data type equals exact 100?

Sorry for the newbie question :)

Answer 1

Floating point is not precise. Try

If Convert.ToInt32(e.TotalPercent * 100.0) = 10000 Then ...

Answer 2

Hi @Peter Volz ,

You can use a threshold or a tolerance level for comparison. Since it appears that the progress is provided as a floating-point number, you can check if the value is very close to 100 within an acceptable tolerance level.

Dim progress As Double = e.TotalPercent
Dim tolerance As Double = 0.01 ' Adjust this tolerance level as needed

If Math.Abs(progress - 100.0) < tolerance Then

End If

Best Regards.

Jiachen Li

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