function with no return value works without problem

[arunmib]

Hi all,
Before posting my question I would like to state that "I am novice in VB, rather to say I am learning VB. My previous coding experience has been with C/C++". Ok, now to the question.

Public Function Add(ByVal iNum1 as Integer, ByVal iNum2 as Integer) As Integer
 
Dim iSum as Integer = 0
 
iSum = iNum1 + iNum2
 
End Sub

So, conceptually speaking there is no "return" statement in the function. So when I build my project there must be an error right. But everything builds fine, not even a warning and I am even able to run the code without any problem and i get the expected(correct) answer.

I mean how is this possible????


P.S : I am using VB.Net and tool is Visual Studio 2003.

[kadghar]

Hi all,

I mean how is this possible????


P.S : I am using VB.Net and tool is Visual Studio 2003.

well that's possible, if you move variables that aren't byval or private inside a function, they'll change in the whole program.

the problem of not giving a return value is that you wont be able to do something like this:

a = sum(b)

you'll have to call the function as a procedure... and in that case, its better to create a procedure (sub) and call it.

In latter versions of VB (like vb express edition) you'll recieve a warning if you do this.

[Killer42]

I don't see anything wrong with the posted code, except that...

• Since you don't set the return value, I would expect it to always return 0
• End Sub isn't correct for a function, but perhaps VB2003 has a more relaxed attitude to that than VB6.

Is it possible that you are actually invoking a built-in Add function rather than your own code?

[QVeen72]

... So, conceptually speaking there is no "return" statement ...

Hi,

In VB6 and higher versions (.Net), you don't have to specify "Return" keyword (like you do in C++).
Yes, It dosen't throw any error.
In the above Function, Function Name should be populated with the Result (which has to be returned)

Add = iSum

In calling program, you can specify

txtSum.Text = Add(2, 8)


Regards
Veena

[Killer42]

... In VB6 and higher versions (.Net), you don't have to specify "Return" keyword (like you do in C++).

Just a historical note; there was no Return available in any of the VB versions up to and including version 6.



(Well... technically there is a Return statement, but it has a completely different meaning and should be ignored here.)

[arunmib]

thanks for the reply ppl :-)