Conditional Operators

Submitted by joken on Wednesday, October 23, 2013 - 08:47.

In Visual Basic, we are using Conditional Operators to evaluate a condition that applied to one or two boolean expressions. An expression returning a value if the that expression is true and a different one if the expression is evaluated as false. The logical AND and OR operators both take two operands. Each operand is a boolean expression. It evaluates to either true or false. The && (logical AND) operator indicates whether both operands are true then it returns true, otherwise it returns false. Evaluating of Logical AND operators through expressions.

Expression				Results
1 && 1					True or 1
1 && 0 					False or 0
0 && 1					False or 0
0 && 0 					False or 0

Visual Basic Code:

'declare a variable
Dim username As String
Dim password As String
'assign value to a variable
username = "joken"
password = "12345"
 
'test if the two expression match, then it welcome the user
If username = "joken" And password = "12345" Then
        'returns true
        MsgBox("Welcome joken!")
 
Else
        'return false
        MsgBox("Username and Password did not match!")
End If

The || (logical OR) operator indicates whether either operand is true, it returns true. Evaluating of Logical OR operators through expressions.

Expression				Results
1 && 1					True or 1
1 && 0 					True or 1
0 && 1					True or 1
0 && 0 					False or 0

Visual Basic Code:

'declare a string variable
Dim name As String
'assign value to a string variable
name = "Joken"
'test if name either of the two expression is true
If name = "Joken" Or name = "joken" Then
        'return true
        MsgBox("Welcom Joken!")
Else
        'return false
        MsgBox("Your not identified!")
End If

In above example example is applicable in real-world application, especially when you are doing the login- logout system or any other application that need to passed through conditional operations.

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