for(n1;n1<=n2;n1++)

 {

 if(n1%2==1)

 {

 Sleep(10);

 //convert int ke char==>sprintf

 sprintf(n3,"%i",n1);

 x=strlen(n3);

 switch(x)

 {

 //Menghitung Angka satuan

 case 1:

 printf("|| ");

 printf(n3);

 printf(" || ");

 printf("%d",n1);

 printf(" ||\n");

 ulang++;

 tdk_ulang++;

 break;

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

 ulang = 0

 tdk_ulang = 0

 n1 = TextBox1.Text

 n2 = TextBox2.Text

 For i = n1 To n1 < n2 Step 1

 If n1 Mod 2 = 1 Then

 Dim n3 As Char = Convert.ToChar(n1)

 x = Str(n3)

 Select Case x

 Case 1

 ListBox1.Items.Add(n2)

 ListBox2.Items.Add(n1)

 ulang += 1

 tdk_ulang += 1

 n1 += 1



 End Select

 End If

 Next



 End Sub