You should learn to use the debugger as soon as possible. Rather than guessing what your code is doing, It is time to see your code executing and ensuring that it does what you expect.
The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[
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Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[
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Dim name As String
name = InputBox("Enter your name", "name")
Dim NameArr() As String
Dim i, initial As String
Dim count As Integer
i = ""
name = ""
nameArr = name.Split(" ")
For count = 0 To NameArr.Length - 1
i = NameArr.Substring(0, 1)
i = i + NameArr.Substring(0, 1)
Next