>>>A friend of mine asked this to me today. I said yes,0 with confidence and he said OK then go and put that in Excel as a formula.
>>>I thought it was an Excel bug but he turned and said it happens in SQL server with float datatype! I couldn't yet see that myself but trust his experience.
>>>Any idea and solution?
>>>TIA
>>
>>Cetin,
>>
>>How're doing? We haven't communicated in a long time.
>>
>>I just have a SWAG, but I think it might be right. I tested this will both Excel and VFP 9.0 and got completely different results. IOW, Excel returned false and VFP, correctly, returned true.
>>
>>The only thing that I can think of that might explain it is the Pentium class process floating point bug.
>>
>>In Excel, when I entered the equation, 1*(0.5-0.4-0.1), it returned -2.77556E-17. Naturally, this isn't equal to zero.
>>
>>Sorry, Cetin, that's all I've got. BTW, Congrats on being a "UT Personality".:-)
>
>Hi George,
>I'm fine and busy all day:)

I expected as much.:-)

>I initially thought it as common roundation error but like you tested with VFP anyway. VFP5-8 returns it as a 0, C#, excel as that -2.7...E-17 value. Interestingly there are smaller numbers in float range close to 0.
>
>Thanks:)

You're welcome, but from you've said, it appears to be that .NET still has the same problems with rounding. Might be something to investigate.