VB.Net/Language Basics/Function Parameter

Calculates the power of a value, defaults to square

Imports System
Public Class MainClass
    Shared Sub Main(ByVal args As String())
      Dim value As Integer
      " call version of Power depending on power input
      value = Power(Convert.ToInt32(3), _
           Convert.ToInt32(10))
      Console.WriteLine( Convert.ToString(value) )
    End Sub
   " use iteration to calculate power
   Shared Function Power(ByVal base As Integer, _
      Optional ByVal exponent As Integer = 2) As Integer
      Dim total As Integer = 1
      Dim i As Integer
      For i = 1 To exponent
         total *= base
      Next
      Return total
   End Function " Power
End Class

Pass Array as Parameters

Imports System
Public Class MainClass
    Shared Sub Main(ByVal args As String())
        Dim friends() As String = {"A", "B", "C","D", "E"}

        AddFriendsToList(friends)
    End Sub
    
    Shared Sub AddFriendsToList(ByVal friends() As String)
        Dim friendName As String
        
        For Each friendName In friends
            Console.WriteLine("[" & friendName & "]")
        Next
    End Sub
End Class

Two Dimension Array: Pass into a Function

Imports System
Public Class MainClass
    Shared Sub Main(ByVal args As String())
        " define an array to hold friends in...
        Dim friends(2, 2) As String
        " set the data...
        friends(0, PersonDataIndex.Name) = "Name 1"
        friends(0, PersonDataIndex.Email) = "Email 1"
        friends(0, PersonDataIndex.Sex) = "Sex 1"
        friends(1, PersonDataIndex.Name) = "Name 2"
        friends(1, PersonDataIndex.Email) = "Email 2"
        friends(1, PersonDataIndex.Sex) = "Ses 2"
        friends(2, PersonDataIndex.Name) = "Name 3"
        friends(2, PersonDataIndex.Email) = "Email 3"
        friends(2, PersonDataIndex.Sex) = "Sex 3"
        AddFriendsToList(friends)
    End Sub
    
    Shared Sub AddFriendsToList(ByVal friends(,) As String)
        Dim row As Integer
        For row = 0 To UBound(friends, 1)
            Dim buf As String = ""
            Dim column As Integer
            For column = 0 To UBound(friends, 2)
                buf &= friends(row, column) & ", "
            Next
            
            Console.WriteLine(buf)
        Next

    End Sub
End Class
 
    Public Enum PersonDataIndex As Integer
        Name = 0
        Email = 1
        Sex = 2
    End Enum

Use Array as Function Parameter

Imports System
Public Class MainClass
    Shared Sub Main(ByVal args As String())
         Dim a As Integer = 5
         Dim b As Integer = 6
         Dim c As Integer = 7
         Console.WriteLine("Calling with three Integers")
         DisplayVals(a, b, c)
         Console.WriteLine("Calling with four Integers")
         DisplayVals(5, 6, 7, 8)
         Console.WriteLine("calling with an array of four Integers")
         Dim explicitArray( ) As Integer = {5, 6, 7, 8}
         DisplayVals(explicitArray)
    End Sub
    Shared Public Sub DisplayVals(ByVal ParamArray intVals( ) As Integer)
        Dim i As Integer
        For Each i In intVals
           Console.WriteLine("DisplayVals {0}", i)
        Next i
    End Sub "DisplayVals
End Class