Android Question Mystery/bug: from string to number

[wimpie3]

Here is a little riddle for you. Given the following code, what does B4A return?

Dim s As String
s="12.340"
Dim f As Float
f=s
Log(f)

You'd expect 12.34, right? The conversion from the string to the floating point numeric value should have dropped the last 0.

Well, it turns out the result that appears in the log is

12.34000015258789

Some kind of rounding error? What's going on here and how can I get the "12.34" I want?

 

[Mahares]

If you declare it as double, it will yield what you want. See example. I have seen a few posts discussing this with Erel's leadership:

Dim s As String ="12.340"
Dim f As Double
f=s
Msgbox(f,"") 'displays 12.34

 

[wimpie3]

Perfect, thanks!

 

[Erel]

The correct way to convert a number to a string is to use NumberFormat or NumberFormat2.