This document provides information on different types of conditional statements in Visual Basic, including If/Then, If/Else, Nested If/Else, Select Case, and looping structures like For/Next, Do/Loop, and While/Wend. It includes syntax examples and explanations of how to use each statement type to make conditional checks and iterate loops in code. Key conditional statements and loops covered are If/Then, If/Else, Nested If/Else, Select Case, For/Next, Do/Loop, While/Wend, and nested looping structures. Examples are provided to demonstrate how each statement can be used.

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3. 1.
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4.
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5.
6.
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4. 1.To- Down Programming
2.Modular Programming
3.Structured Coding
4

5. If/then
If Condition Then
statements
End If
Dim num1 As Integer
num1 = 30
If num1 > 0 Then
Print "The number is positive"
End If
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6. If /Else
If Condition Then
statements1
Else
statements2
End If
Dim num1 As Integer, num2 As Integer
num1 = 30
num2 = 50
If num1 > num2 Then
Print num1
Else
Print num2
End If
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7. Nested If-Else
If Condition Then
statements
ElseIf Condition then
statements
ElseIf Condition Then
statements
.......................
......................
Else
statements
End If
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8. Nested If-Else
a = Val(InputBox("Enter a no."((
If a > 0 Then
Print "Positive"
ElseIf a < 0 Then
Print "Negative"
Else
Print "Zero"
End If
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9. Nested If-Else
Dim num1 As Integer, num2 As Integer
num1 = InputBox("Enter 1st number"(
num2 = InputBox("Enter 2nd number"(
If (num1 > 0) And (num2 > 0) Then
MsgBox "Both the numbers are positive"
End If
If (num1 > 0) Or (num2 > 0) Then
MsgBox "Either 1st number or 2nd number or both are positive"
End If
If Not (num1 = 0) Then
MsgBox "The first number is non-zero"
End If
If (num1 > 0) Xor (num2 > 0) Then
MsgBox "Either 1st number or 2nd number is positive“
End If
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10. 10

11. Private Sub cmdCalculate_Click)(
Dim num1 As Integer, num2 As Integer, num3 As Integer
num1 = Val(txtNum1.Text(
num2 = Val(txtNum2.Text(
num3 = Val(txtNum3.Text(
If num1 > num2 And num1 > num3 Then
lblResult.Caption = num1
ElseIf num2 > num1 And num2 > num3 Then
lblResult.Caption = num2
Else
lblResult.Caption = num3
End If
End Sub
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12. Select Case
Select Case expression
Case value 0
statements
Case value 1
statements
Case value 2
statements
...........
...............
Case else
statements
End select
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13. Select Case
Dim num As Integer
num = Val(Text1.Text)
Select Case num
Case Is > 0
Print "Positive number"
Case Is < 0
Print "Negative number"
Case 0
Print "Zero"
End Select
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14. 14

15. Private Sub cmdCalculate_Click)(
Dim n As Long
n = Val(txtNum.Text(
Select Case n
Case 0 To 9
lblResult.Caption = "Single digit number"
Case 10 To 99
lblResult.Caption = "two digit number"
Case 100 To 999
lblResult.Caption = "Three digit number"
Case 1000 To 9999
lblResult.Caption = "Four digit number"
Case 10000 To 99999
lblResult.Caption = "Five digit number"
Case Else
lblResult.Caption = "More than Five digit number"
End Select
End Sub
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16. 16

17. Private Sub cmdCalculate_Click()
Dim s As String
s = txtGrade.Text
Select Case s
Case "E"
lblMarks.Caption = "above 90%"
lblRemarks.Caption = "Excellent"
Case "A+"
lblMarks.Caption = "above 80%"
lblRemarks.Caption = "Very Good"
Case "A"
lblMarks.Caption = "above 70%"
lblRemarks.Caption = "Good"
Case "B"
lblMarks.Caption = "above 60%"
lblRemarks.Caption = "Average"
Case "C"
lblMarks.Caption = "above 50%"
lblRemarks.Caption = "Satisfactory"
Case "D"
lblMarks.Caption = "above 40%"
lblRemarks.Caption = "Poor"
Case "F"
lblMarks.Caption = "above 35%"
lblRemarks.Caption = "Fail"
End Select
End Sub
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18. IFF
18

19. Switch
19
r

20. Switch
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21. Choose
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22. For/Next
Dim i As Integer For i = 0 To 6 Step 2
Print i
Next i
_______________________________
Dim i As Integer For i = 10 To 0 Step -3
Print i
Next i
________________________________
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23. Do/Loop
Do While Condition
statement(s)
Loop
_______________________
Do
statement(s)
Loop while Condition
_______________________
Do
statement(s)
Loop Until Condition
_______________________
Do Until Condition
Statement(s)
loop
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24. Do/ Loop While
Dim num As Integer num = 0
Do
Print num
num = num + 1
Loop While num <= 10
___________________________
Dim num As Integer num = 11
Do
Print num
num = num + 1
Loop While num < 10
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25. Do While/Loop
Dim num As Integer num = 0
Do While num < 10
Print num
num = num + 1
Loop
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26. Do/Loop Until
'x is incremented until x becomes greater than 10
Dim x As Integer
x = 0
Do
Print x
x = x + 1
Loop Until x > 10
MsgBox x
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27. Do Until/Loop
Private Sub Command1_Click()
x = 1
Index = 1
Do Until Index >= 21
Print x, x * x, x ^ 3
x = x + 2
Index = Index + 1
Loop
End Sub
27

28. WHILE/WEND
While condition
Statements…….
……………
……………
Wend
Private Sub Command1_Click()
x = 1
Index = 1
While Index <= 21
Print x, x * x, x ^ 3
x = x + 2
Index = Index + 1
wend
End Sub
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29. Nested Loops
29
For loop
For counter1=startNumber to endNumber (Step increment)
For counter2=startNumber to endNumber (Step increment)
One or more VB statements
Next counter2
Next counter1

30. Nested Loops
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Private Sub Form_Activate ( )
Dim x as integer, y as integer
For x= 1 to 5
Print “Hello”
For y=1 to 4
Print “Welcome to the VB tutorial”
Next y
Next x
Print ” Thank you”
End Sub

31. Dim x As Integer
Private Sub Command1_Click()
List1.Clear
Dim i As Integer, y As Integer
x = Text1.Text
For i = 1 To 12
y = x * i
List1.AddItem x & "*" & i &
"=" & y
Next i
End Sub
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