To declare or not to declare

[georgiboy]

I have to agree on that part @Paul_Hossler,

In my experience, I am able to capture errors earlier in the code and (to me) they make more sense as to where the errors form. Take the below for example, without declarations the error forms on the last line and (again, to me) does not seem completely obvious as to why:

Sub NotDeclared()    
    s = "Hello world"    
    ' some code...    
    n = s    
    ' Lots and
    ' lots and
    ' lots of code    
    MsgBox n + 1 '<<< Error comes here
End Sub

Whereas with the variables being declared (below), the error comes much earlier in the code and seems (to me) more obvious as to what the problem is as it comes when passing a value to a variable. Worth noting also that the error was triggered before the 'Lots of code' part, so if you are into writing long sub routines then it could save you some scrolling up and down:

Sub Declared()
    Dim s As String, n As Long    
    s = "Hello world"    
    ' some code...    
    n = s  '<<< Error comes here    
    ' Lots and
    ' lots and
    ' lots of code    
    MsgBox n + 1
End Sub

I would still like to see some arguments for not declaring as I am sure there are some logical arguments and thought processes behind both methods.