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    <p>I presented a solution in Experts Exchange, which you may not be able to see (if you never payed them) so I copy it for you:</p> <p>Question was: I have n items and each item can be assigned a 1 or a 2. So I would like to get the matrix result that would generate all possible combinations.</p> <p>For eg. if n= 3 , then the possible outcomes are : I need an algorithm that can generate this series for n . Please help thanks. ideally i would like to store the result in a datatable</p> <pre><code> 1 1 1 1 1 2 1 2 1 2 1 1 2 1 2 1 2 2 2 2 1 2 2 2 </code></pre> <p>Answer:</p> <pre><code> Dim HighestValue As Integer = 2 ' max value Dim NrOfValues As Integer = 3 ' nr of values in one result Dim Values(NrOfValues) As Integer Dim i As Integer For i = 0 To NrOfValues - 1 Values(i) = 1 Next Values(NrOfValues - 1) = 0 ' to generate first as ALL 1 For i = 1 To HighestValue ^ NrOfValues Values(NrOfValues - 1) += 1 For j As Integer = NrOfValues - 1 To 0 Step -1 If Values(j) &gt; HighestValue Then Values(j) = 1 Values(j - 1) += 1 End If Next Dim Result As String = "" For j As Integer = 0 To NrOfValues - 1 Result = Result &amp; CStr(Values(j)) Next Debug.WriteLine(Result) Next </code></pre> <p>Ok Here's the solution, you just need to change the Debug.Writeline with a write to your file</p> <pre><code> Dim HighestValue As Integer = 3 ' max value Dim NrOfValues As Integer = 3 ' nr of values in one result Dim Values(NrOfValues) As Integer Dim i As Integer For i = 0 To NrOfValues - 1 Values(i) = 1 Next Values(NrOfValues - 1) = 0 ' to generate first as ALL 1 For i = 1 To HighestValue ^ NrOfValues Values(NrOfValues - 1) += 1 For j As Integer = NrOfValues - 1 To 0 Step -1 If Values(j) &gt; HighestValue Then Values(j) = 1 Values(j - 1) += 1 End If Next Dim Result As String = "" For j As Integer = 0 To NrOfValues - 1 If Values(j) = 1 Then Result = Result &amp; "d" If Values(j) = 2 Then Result = Result &amp; "o" If Values(j) = 3 Then Result = Result &amp; "n" 'Result = Result &amp; CStr(Values(j)) Next Debug.WriteLine(Result) Next </code></pre>
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    1. COHow to use this function? I need return a string.
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    2. COTake the string in Debug.WriteLine(Result), which contains the values of e solution, concatenate them to ger all together, I can only give you the algorithm, you'll have to adapt it to your needs
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