Visual Basic Programming

Control Structure IF ... THEN
Forms of writing (syntax) IF ... THEN structure:
IF THEN
When is True then be done.
IF THEN

ELSE

END IF

Example :

Dim average as Integer
average = 45
If average> 50 Then
txtGrade.Text = "Pass"
Else
txtGrade.Text = "Fail"
End If


If Then
statements A
ElseIf Then
statements 2
ElseIf Then
statements 3
Else
statements 4
End If

Example :
If average> 75 Then
txtGrade.Text = "A"
ElseIf average> 65 Then
txtGrade.Text = "B"
ElseIf average> 55 Then
txtGrade.text = "C"
ElseIf average> 45 Then
txtGrade.Text = "S"
Else
txtGrade.Text = "F"
End If