Output/Print variable, in code, in if statement - vba

Question

I am trying to achieve the following:
The user is shown an excel spread sheet with a list of assumption which they can change.
Title | Value |
Input01 | 10 | =
Input02 | 2 | >=
Input03 | 800 | >=
Input04 | 4 | >=
Input05 | 2 | <=
There is an If .. Then Statement that pulls in data if the assumption are met. However if an assumption is blanc, it should not be included in the If .. Then Statement.
If x = Input01Value And y >= Input02Value _
And z >= Input03Value And a >= Input04Value _
And b <= Input05Value Then
User ommits Input03
If x = Input01Value And y >= Input02Value _
And a >= Input04Value And b <= Input05Value Then
Now I could check to see if each value exist, and then follow it by another If statement with the appropriate variables. But this seems a bit redundant.
I was wondering if something like the following is possible:
Input 01 = ""
If Input01Value != "" Then Input01 = "x = " & Input01Value
'Then use join or something similar to join all of them ..
And Then use this Input01 directly in the If .. Then statement. This way when a variable is empty the And .. are not included and the If statement will not fail.
Eg. (I know this doesn't work, just illustrating the scenario)
VBA: If Input01 Then
Result while compiling: If x = Input01Value Then
Please Note, I know I could do something like the following:
If Boolean And Variable2 > 4 Then and then have Boolean and Variable2 populate with a value in the cell, however the issue with this is that if the user, for example, decides to omit the Variable2 (which is reasonable) it will fail. eg. If (Boolean = True) And > 4 Then.
Hope my question is clear, thanks for the help.

Answer 1

What about using a function which operates on a select case depending on a string operator and two values?
Function conditionalString(condition As String, x As Variant, y As Variant) As Boolean
Select Case condition
Case "="
If (x = y) Then
conditionalString = True
Else
conditionalString = False
End If
Exit Function
Case ">="
conditionalString = (x >= y)
Exit Function
Case "<="
conditionalString = (x <= y)
Exit Function
Case ">"
conditionalString = (x > y)
Exit Function
Case "<"
conditionalString = (x < y)
Exit Function
Case Else
conditionalString = False
End Select
End Function
You could then just have another function, say "check if value isn't blank" before calling all assumptions.

Answer 2

Expanding on my comment, you can use something like this to test each row of input.
Function TestIt(testValue,inputOperator,inputValue) As Boolean
If Len(inputValue)=0 Then
TestIt=True 'ignore this test: no value supplied
Else
TestIt=Application.Evaluate(testValue & inputOperator & inputValue)
End If
End function