Function Return in Visual Basic .NET

In Visual Basic .NET, a method or function can return a value by using the Return keyword followed by the value to be returned. Here is an example of a function that takes two integers as input and returns their sum:

Public Function Add(ByVal a As Integer, ByVal b As Integer) As Integer
    Return a + b
End Function

In this example, the Add function takes two integer parameters, a and b, and returns their sum by using the Return keyword followed by the expression a + b.

Here's another example of a more complex function that returns a string with the uppercase version of the input string:

Public Function ToUpperCase(ByVal str As String) As String
    Dim result As String = ""
    For Each c As Char In str
        result &= Char.ToUpper(c)
    Next
    Return result
End Function

In this example, the ToUpperCase function takes a string parameter str, and uses a For Each loop to iterate over each character in the string, converting it to uppercase and concatenating it to the result string. Finally, the function returns the uppercase version of the input string by using the Return keyword followed by the result string.

To use these functions, you can call them from another part of your code like this:

Dim sum As Integer = Add(2, 3)
Console.WriteLine(sum)
Dim upper As String = ToUpperCase("hello, world!")

Console.WriteLine(upper)

In this example, we call the Add function with arguments 2 and 3, which returns 5. We assign this value to a variable called sum and print it to the console.

We also call the ToUpperCase function with the string "hello, world!", which returns "HELLO, WORLD!". We assign this value to a variable called upper and print it to the console.