In this article, I will explain you about Conditional
Statements in Visual Basic .NET
If....Else Statement
The control statements which allows us if a condition is true execute a
expression and if it is False execute a different expression is
If conditional expression. The expression
followed by Then keyword will be executed if the
condition is true, otherwise the expression followed by ElseIf
keyword will be checked and if it is true then that expression will be executed.
Example:
Imports
System.Console
Module Module1
Sub Main()
Dim A As Integer
Write("Enter a Number, 10 or 20 or
30")
A = Val(ReadLine())
'ReadLine() method is
used to read from console
If A = 10 Then
WriteLine("Ten")
ElseIf A = 20
Then
WriteLine("Twenty")
ElseIf A = 30
Then
WriteLine("Thirty")
Else
WriteLine("Number not 10,20,30")
End If
Read()
End Sub
End Module
Output of the above code is given below:
Select….Case Statement
The
Select Case control structure is nearly same as the If....ElseIf control
structure. Select Case Statement can make decision only on one statement. Select
Case is preferred when your code has the
ability to handle many conditions of a particular variable. Select Case is use
to test the expression, which of the given cases it matches and execute the code
in that expression.
Example:
Imports
System.Console
Module Module1
Sub Main()
Dim Password As Integer
Write("Enter a number between 1 and
6")
Password = Val(ReadLine())
Select Case
Password
Case 1
WriteLine("You entered 1")
Case 2
WriteLine("You entered 2")
Case 3
WriteLine("You entered 3")
Case 4
WriteLine("You entered 4")
Case 5
WriteLine("You entered 5")
Case 6
WriteLine("You entered 6")
End Select
Read()
End Sub
Output of the above code is given below:
Summary
I hope this article help you to understand Conditional Statements in Visual
Basic .NET