Numerical Bug in VB6?

Asked Jan 19 '22 at 11:51

Active Jan 19 '22 at 11:57

Viewed 54 times

Go to the immediate window in Visual Basic 6 and type

?(2.42+0.58)=3.00

This statement returns True as you'd expect

But this returns False!

?(2.42+0.57)=2.99

Note, it seems to be related to Double numerical types, if converted to another type its ok, eg

?CCur(2.42+0.57)=2.99

Why ??! Is this a bug in the VB compiler?

edited Jan 19 '22 at 11:57

asked Jan 19 '22 at 11:51

userSteve

2

Here's a recent question that provides [the answer](https://stackoverflow.com/q/70617554/5162073). – Brian M Stafford Jan 19 '22 at 12:07
2

It seems that this lesson has to be learned, or re-learned, person by person for all time. – Jim Mack Jan 19 '22 at 12:41
1

Is there a canonical answer for this in VB6? Or even just more generally? – StayOnTarget Jan 19 '22 at 14:30
@StayOnTarget Here's [another question](https://stackoverflow.com/q/588004/5162073) that's a little more in depth on the topic. – Brian M Stafford Jan 19 '22 at 18:40
@BrianMStafford thanks! Very similar to this Q and language-agnostic, seems like a good fit to me. – StayOnTarget Jan 19 '22 at 18:41
@userSteve This works `? CDec(2.42) + 0.58 = 3.00` – wqw Jan 22 '22 at 18:21
@wqw Yes, that works, but +0.57 does not – userSteve Jan 25 '22 at 10:16
@userSteve This works too `? CDec(2.42) + 0.57 = 2.99` – wqw Jan 25 '22 at 12:45

0 Answers0