Question

While a “for loop” is running in VB.net, C# or Python which method can be used to append each result to a variable?

Answer 1

Do you mean like this? This will store each item (singleCharacter) in the iteration, thereby keeping them in memory.

Dim someString As String = "The quick brown fox jumps over the lazy dog."
Dim vals As List(Of Char) = New List(Of Char)

For Each singleCharacter As Char In someString
    vals.Add(singleCharacter)
Next