新手问题：Write out the output for the following loop .

Question

For i = 0 To 10 Step 3
            w.Graphics.DrawString(i, New Font("Arial", 12), Brushes.Black, x, y)
            y = y + 15
 Next i

如题。不理解此题目的意思及看不懂它有什么作用，谢谢高手解答。