Paul Paul - 3 months ago 7x Question

Rounding a number down in VB

I have a vb application that need to round a number down e.g. 2.556 would become 2.55 and not 2.26

I can do this using a function to strip off the characters more that 2 right from the decimal point using this:

Dim TheString As String
TheString = 2.556
Dim thelength = Len(TheString)
Dim thedecimal = InStr(TheString, ".", CompareMethod.Text)
Dim Characters = thelength - (thelength - thedecimal - 2)
_2DPRoundedDown = Left(TheString, Characters)

Does any one know of a better function to do this?


You can do this with Math.Floor. However, you'll need to multiply * 100 and divide, since you can't supply a number of digits

Dim theNumber as Double
theNumber = 2.556
Dim theRounded = Math.Sign(theNumber) * Math.Floor(Math.Abs(theNumber) * 100) / 100.0