Decision Making statements in Visual Basic
Decision making statements are often used to validate certain condition and based on that execute some piece of code. As the name suggest, this statements are used to check certain conditions. We can have multiple conditions in the statement and according to output, whether the check returns True or False, make some decision in your program.
There are two types of decision making statements in visual basic, as follows:
- If Statements
- Select Case Statements
If statements can further be classified into three types:
- If - Then Statements: An If - Then statements has only one condition and if that condition gets satisfied that a particular piece of code gets executed
Example:
If name = "XYZ" Then
MsgBox "Welcome" & name
End if
- If -then-else statements: This statements handles both the scenario, what should happen when a condition gets satisfied and what should happens if it doesn't.
Example:
If name = "XYZ" Then
MsgBox "Welcome" & name
Else
MsgBox "You are not an authorized person"
End if
- Nested IF-Then-Else Statements: This statements has two or more statements based on which our program acts.
Example:
If name = "XYZ" Then
MsgBox "Welcome" & name
Elseif name = "ABC"
MsgBox "Welcome" & name
Else
MsgBox "You are not an authorized person"
End if
Select Case statements are generally used when there are more conditions to check , which gets quite complicated to handle
Example:
Select Case name
Case "XYZ"
MsgBox "Welcome" & name
Case "ABC"
MsgBox "Welcome" & name
Case "IJK"
MsgBox "Welcome" & name
Case "ELSE"
MsgBox "You are not an authorized person"
END SELECT
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