Question

How to use increment operators ++ and -- in VB.NET

Answer 1

Imports System
Imports System.Threading.Interlocked ' Increment & Decrement

Public Class Program
    Public Shared Sub Main(ByVal args As String())
        Dim a As Integer = 3
        Dim b As Integer = 8
         
		Increment(a) ' System.Threading.Interlocked
        Decrement(b) ' System.Threading.Interlocked
		Console.WriteLine(a & " " & b)
		
		Increment(a)
        Decrement(b)
		Console.WriteLine(a & " " & b)
    End Sub
End Class




' run:
'
' 4 7
' 5 6
'

 

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Answer 2

Imports System
Imports System.Threading.Interlocked ' Increment & Decrement

Public Class Program
	Public Shared Sub Test(ByVal x As Integer)
        Console.WriteLine(x)
    End Sub
    Public Shared Sub Main(ByVal args As String())
        Dim a As Integer = 3
        Dim b As Integer = 8
         
		Test(Increment(a)) 
        
		Test(Decrement(b))
    End Sub
End Class




' run:
'
' 4
' 7
'

 

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Answer 3

Imports System
Imports System.Threading.Interlocked ' Increment & Decrement

Public Class Program
	Public Shared Sub PP(ByRef x As Integer)
        Increment(x)
    End Sub
	Public Shared Sub MM(ByRef x As Integer)
        Decrement(x)
    End Sub
    Public Shared Sub Main(ByVal args As String())
        Dim a As Integer = 3
        Dim b As Integer = 8
         
		PP(a)
		PP(a)
		
		MM(b)
		MM(b)
        
		Console.WriteLine(a)
		Console.WriteLine(b)
    End Sub
End Class




' run:
'
' 5
' 6
'

 

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