Visual Basic 6 query

Hi Experts
Can someone please explain what does 0# mean in VB6.

Here is an example of its usage-

Dim f()                 As Single
    Dim m()                 As Single
    Dim i                   As Integer
    Dim j                   As Integer
    Dim K                   As Integer
    Dim C                   As Integer
    Dim ct                  As Integer
    Dim iCount              As Integer
    Dim xCount              As Long
    Dim bCompInvalid        As Boolean
    Dim iSum                As Integer
    Dim iNewRow             As Integer
    Dim iOldRow             As Integer
    Dim iHoldNeg            As Integer
    Dim dFact               As Double
    Dim dHoldVal            As Double
    Dim dTotal              As Double
    Dim msg                 As String
    Dim rdoRs               As rdoResultset
    Dim rdoTmpRs            As rdoResultset
    Dim dAppRate            As Double
       
        ReDim f(CompNo + 1, CompNo + 3)
        ReDim m(CompNo + 1, CompNo + 3)
           
             
        If colSelectedIngredients.Count > 0 Then
            For i = 1 To CompNo + 1
                For j = 1 To CompNo + 3
                    f(i, j) = 0#
                Next j
            Next i