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vb Asp.net - difference between Sub and Function ?!?

Posted on 2004-07-30
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Last Modified: 2008-03-04
Hey what's the difference?

If i wanted the piece of code (procedure or Function) to return 2 values (eg getCustomerInfo())
What should i use

<Currently I used a sub which passed values in ByRef >
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Question by:MargusLehiste
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jrandallsexton earned 500 total points
ID: 11680926
A sub does not return values.  A function does.

If you need to return two values, yes, a sub using ByRef is the bestway.

However, you could use a Function that returns a collection of values such as an arraylist.

Public Function MyFunc(someVal, someVal2) as arraylist
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by:crescendo
crescendo earned 500 total points
ID: 11681009
If you need to return two values, then either a sub or a function will work. Functions are useful in this scenario where one of the returned values indicates a status, because it makes the coding neater, for example:

    If SomeFunction(ParameterA) = 0 Then
        ' do one thing
    Else
        ' do something else
   End If

as opposed to

    SomeSub(PameterA, ParamaterB)
    If Parameter B = 0
        ' do one thing
    Else
        ' do something else
   End If

It's just a matter of readability.
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by:MargusLehiste
ID: 11681470
Excellent - answers both.

Now I just need to figure out where to stick those subs and function which i need to use in every webForm
(Have another post for that)
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