Title here
Summary here
Functions in Visual Basic .NET
Functions are central in Visual Basic .NET. We’ll learn about functions with a few different examples.
Imports System
Module Program
' Here's a function that takes two Integers and returns
' their sum as an Integer.
Function Plus(a As Integer, b As Integer) As Integer
' Visual Basic .NET doesn't require explicit returns,
' the value of the last expression is automatically returned.
Return a + b
End Function
' When you have multiple consecutive parameters of
' the same type, you can declare them together.
Function PlusPlus(a As Integer, b As Integer, c As Integer) As Integer
Return a + b + c
End Function
Sub Main()
' Call a function just as you'd expect, with
' name(args).
Dim res As Integer = Plus(1, 2)
Console.WriteLine("1+2 = " & res)
res = PlusPlus(1, 2, 3)
Console.WriteLine("1+2+3 = " & res)
End Sub
End ModuleTo run the program, save it as Functions.vb and use the Visual Basic .NET compiler:
$ vbc Functions.vb
$ mono Functions.exe
1+2 = 3
1+2+3 = 6There are several other features to Visual Basic .NET functions. One is multiple return values, which we can achieve using tuples or custom objects.