How to Use If Statement in VB.NET With Example

This article how to use If statement in VB.Net with example will teach you how to properly use the if statement using vb.net with practical examples that can be used in real situations.

Sample Syntax

If condition Then [ statements ] [ Else [ else statements ] ]

The “If statement in vb.net” is a conditional logic branching in computer programming.

It contains true and false statements in computer terminology.

The true statement evaluates a nonzero value while the false statement evaluates a zero value.

Explanation with Flowchart

Just like in the sample diagram below, it evaluates the condition if the condition is “TRUE” then it performs the action that corresponds to the statement but, if the condition is “FALSE” the program will perform the alternative action.

This conditional logic is not just for computer programming but this can be also used in your daily life without realizing you’re doing it.

For instance, if you know how to catch fish then you have something to eat for the day but if not, you will be hungry the whole day.
Here’s the example of if and else statement:

Dim name as String
name = "xyre"

If name= "xyre" Then
MessageBox.Show("Name is xyre")
else
MessageBox.Show("Name is not xyre")
End If

Another Example

    Dim username As String
    Dim userpass As String

    username = "admin"
    userpass = "admin"

    If username = "admin" And userpass = "admin" Then
        MsgBox("Welcome itsourcecode")
    Else
        MsgBox("Access is denied!")
    End If

Code Explanation

Time needed: 10 minutes

How to use If Statement in VB.Net code explanation

Declare a Variable
In the first two lines, we declare a variable “username” and “userpass” as a string data type.
Assign Value to a Variable
Next, we assign value to those variable (username and userpass)
Start Condition
Then, we start the condition and check if the username and userpass are equal to the assigned value.

Perform the Action
Next, we evaluate the result of condition if it is TRUE then it will display a popup that says “Welcome itsourcecode”.
Set Alternative Action
In this line, we set an alternative action if the result of condition is false.
End Condition
Finally, we and the statement.

This if statement in vb.net tutorial is an upgrade version of my tutorial “if statement” in another site way back 2013.

I have here a bonus tutorial of using if statement in vb.net but in this case, it will be using nested if statement.

  Dim username As String
        Dim userpass As String

        username = "admin"
        userpass = "admin"

        If username = "admin" And userpass = "ad" Then

            If username = "admin" And userpass = "adm" Then
                If username = "admin" And userpass = "admin" Then
                    MsgBox("Welcome itsourcecode")

                Else
                    MsgBox("Access is denied!")
                End If

            Else
                MsgBox("Access is denied!")
            End If
        Else
            MsgBox("Access is denied!")
        End If

Inquiries

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