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Hello,

I'm working on a sudoku type game with 4x4 squares rather than the typical 9x9 and I have written code to generate a random number for each button when new game is clicked the problem is it will generate 1 to 4 boards and then it freezes up I'm sure itis getting stuck in the loop but I just don't understand why it's freezing. Here is the code I wrote:

```
Private Sub newgme_clk(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button23.Click
Dim randomnum(15) As Integer
Dim i As Integer
Randomize()
randomnum(0) = CInt(Int(Rnd() * 4 + 1))
restartnumber2:
For i = 1 To 4
Randomize()
randomnum(1) = CInt(Int(Rnd() * 4 + 1))
If randomnum(1) = randomnum(0) Then
GoTo restartnumber2
End If
Next
restartnumber3:
For i = 1 To 4
Randomize()
randomnum(2) = CInt(Int(Rnd() * 4 + 1))
If randomnum(2) = randomnum(0) Or randomnum(2) = randomnum(1) Then
GoTo restartnumber3
End If
Next
restartnumber4:
For i = 1 To 4
Randomize()
randomnum(3) = CInt(Int(Rnd() * 4 + 1))
If randomnum(3) = randomnum(0) Or randomnum(3) = randomnum(1) Or randomnum(3) = randomnum(2) Then
GoTo restartnumber4
End If
Next
restartnumber5:
For i = 1 To 4
Randomize()
randomnum(4) = CInt(Int(Rnd() * 4 + 1))
If randomnum(4) = randomnum(0) Or randomnum(4) = randomnum(1) Then
GoTo restartnumber5
End If
Next
restartnumber6:
For i = 1 To 4
Randomize()
randomnum(5) = CInt(Int(Rnd() * 4 + 1))
If randomnum(5) = randomnum(0) Or randomnum(5) = randomnum(1) Or randomnum(5) = randomnum(4) Then
GoTo restartnumber6
End If
Next
restartnumber7:
For i = 1 To 4
Randomize()
randomnum(6) = CInt(Int(Rnd() * 4 + 1))
If randomnum(6) = randomnum(2) Or randomnum(6) = randomnum(3) Or randomnum(6) = randomnum(4) Or randomnum(6) = randomnum(5) Then
GoTo restartnumber7
End If
Next
restartnumber8:
For i = 1 To 4
Randomize()
randomnum(7) = CInt(Int(Rnd() * 4 + 1))
If randomnum(7) = randomnum(2) Or randomnum(7) = randomnum(3) Or randomnum(7) = randomnum(4) Or randomnum(7) = randomnum(5) Or randomnum(7) = randomnum(6) Then
GoTo restartnumber8
End If
Next
restartnumber9:
For i = 1 To 4
Randomize()
randomnum(8) = CInt(Int(Rnd() * 4 + 1))
If randomnum(8) = randomnum(0) Or randomnum(8) = randomnum(4) Then
GoTo restartnumber9
End If
Next
restartnumber10:
For i = 1 To 4
Randomize()
randomnum(9) = CInt(Int(Rnd() * 4 + 1))
If randomnum(9) = randomnum(1) Or randomnum(9) = randomnum(5) Or randomnum(9) = randomnum(8) Then
GoTo restartnumber10
End If
Next
restartnumber11:
For i = 1 To 4
Rnd(-1)
Randomize()
randomnum(10) = CInt(Int(Rnd() * 4 + 1))
If randomnum(10) = randomnum(2) Or randomnum(10) = randomnum(6) Or randomnum(10) = randomnum(8) Or randomnum(10) = randomnum(9) Then
GoTo restartnumber11
End If
Next
restartnumber12:
For i = 1 To 4
Rnd(-1)
Randomize()
randomnum(11) = CInt(Int(Rnd() * 4 + 1))
If randomnum(11) = randomnum(3) Or randomnum(11) = randomnum(7) Or randomnum(11) = randomnum(8) Or randomnum(11) = randomnum(9) Or randomnum(11) = randomnum(10) Then
GoTo restartnumber12
End If
Next
restartnumber13:
For i = 1 To 4
Rnd(-1)
Randomize()
randomnum(12) = CInt(Int(Rnd() * 4 + 1))
If randomnum(12) = randomnum(0) Or randomnum(12) = randomnum(4) Or randomnum(12) = randomnum(8) Or randomnum(12) = randomnum(9) Then
GoTo restartnumber13
End If
Next
restartnumber14:
For i = 1 To 4
Rnd(-1)
Randomize()
randomnum(13) = CInt(Int(Rnd() * 4 + 1))
If randomnum(13) = randomnum(1) Or randomnum(13) = randomnum(5) Or randomnum(13) = randomnum(9) Or randomnum(13) = randomnum(8) Or randomnum(13) = randomnum(12) Then
GoTo restartnumber14
End If
Next
restartnumber15:
For i = 1 To 4
Rnd(-1)
Randomize()
randomnum(14) = CInt(Int(Rnd() * 4 + 1))
If randomnum(14) = randomnum(2) Or randomnum(14) = randomnum(6) Or randomnum(14) = randomnum(10) Or randomnum(14) = randomnum(11) Or randomnum(14) = randomnum(12) Or randomnum(14) = randomnum(13) Then
GoTo restartnumber15
End If
Next
restartnumber16:
For i = 1 To 4
Rnd(-1)
Randomize()
randomnum(15) = CInt(Int(Rnd() * 4 + 1))
If randomnum(15) = randomnum(3) Or randomnum(15) = randomnum(7) Or randomnum(15) = randomnum(11) Or randomnum(15) = randomnum(12) Or randomnum(15) = randomnum(13) Or randomnum(15) = randomnum(14) Then
GoTo restartnumber16
End If
Next
Button1.Text = randomnum(0)
Button2.Text = randomnum(1)
Button3.Text = randomnum(2)
Button4.Text = randomnum(3)
Button5.Text = randomnum(4)
Button6.Text = randomnum(5)
Button7.Text = randomnum(6)
Button8.Text = randomnum(7)
Button9.Text = randomnum(8)
Button10.Text = randomnum(9)
Button11.Text = randomnum(10)
Button12.Text = randomnum(11)
Button13.Text = randomnum(12)
Button14.Text = randomnum(13)
Button15.Text = randomnum(14)
Button16.Text = randomnum(15)
End Sub
End Class
```

I have tried changing the randomnum(15) to a long and a byte as well as a single data

type and it hasn't made a difference. the other difference that I noticed was that by adding Rnd(-1) before the randomize() on the last few loops helped but it's still freezing up. Thanks for any help.