来自变量定义的明显不正确的值？

Question

New to VBA and lousy at it, so please be gentle!

I have the following code which gives the Long type variable "EIa" a value. I was getting a bunch of odd results later down the code so I put in some Debug.Print lines to find my issue and notice that when I Debug.Print the variable EIa, I get 0 but if I Debug.Print EXACTLY the expression that defines EIa, I get the expected value. Code below, any ideas?

        'Calculate mA1:
'****************************************************************************************************
EIa = Etimber * ImatA / (Etimber * (ImatA + ImatB + ImatC + ImatD))
Debug.Print "EIa = "; EIa
Debug.Print "EIa = "; Etimber * ImatA / (Etimber * (ImatA + ImatB + ImatC + ImatD))
mA1 = 12 * 0.5 * (q1PSF * EIa) * bMat * LcantiA ^ 2 '12 puts this into lb-in
    If LmatSymA = 0 Then
        fbA1 = 0
    Else
        fbA1 = (mA1 * (0.5 * tMatA) / ImatA)
    End If

Answer 1

The result of the expression is a kind of fractional, floating point number, but since you defined EIa as Long (a large integer), it gets truncated to zero upon assignment. See Visual Basic Data Types .