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Visual Basic GoTo Statement
Visual Basic GoTo Statement
In visual basic, the GoTo statement is useful to transfer the program control to the specified labeled statement. It is useful to get out of the loop or exit from deeply nested loops based on our requirements.
In visual basic, the defined labeled statement must always exist in the scope of GoTo statement, and we can also define the multiple GoTo statements in our application to transfer the program control to the specified labeled statement.
For example, we can use GoTo statement in Select statement to transfer control from one Select-Case label to another or the default label based on our requirements.
Visual Basic Goto Statement Syntax
Following is the syntax of defining the GoTo statement in a visual basic programming language.
If you observe the above syntax, we defined a GoTo statement using GoTo keyword and labeled_statement. Here, the labeled_statement transfers the program control to the specified labeled_statement position.
Now, we will see how to use GoTo statement in visual basic for loop to get out of the loop at the particular condition with examples
Visual Basic Goto Statement with For Loop Example
Following is the example of using GoTo statement in for loop to move the program control to the specified label statement based on our requirements.
Sub Main()
For i As Integer = 1 To 10 - 1
If i = 5 Then
GoTo endloop
End If
Console.WriteLine("i value: {0}", i)
Next
endloop:
Console.WriteLine("The end")
Console.WriteLine("Press Enter Key to Exit..")
Console.ReadLine()
End Sub
End Module
If you observe above example, we used GoTo statement in for loop with labeled statement “endloop” to exit for loop and transfer the program execution to the defined label statement whenever the variable (i) value equals 5.
We will get the following result when we execute the above visual basic program.
If you observe the above result, whenever the variable (i) value equals 5, the GoTo statement transfers the program control from for loop to the specified label statement (endloop) position.
Visual Basic Goto Statement with Select Statement
In visual basic, we can use the GoTo statement to exit from the defined loops or transfer the control to the specific Select-Case label or the default label in the Select statement based on our requirements.
Now, we will see how to use GoTo statement in the Select-Case statement with an example. Following is the example of using GoTo with Select-Case statement to transfer the control from one Select-Case label to another based on our requirements.
Sub Main()
Dim i As Integer = 3, j As Integer = 0
Select Case i
Case 1
j += 20
Console.WriteLine("j value is {0}", j)
Case 2
j += 5
GoTo Case1
Case 3
j += 30
GoTo Case1
Case Else
Console.WriteLine("Not Known")
End Select
Console.WriteLine("Press Enter Key to Exit..")
Console.ReadLine()
End Sub
End Module
If you observe the above example, we used GoTo statement in multiple Select cases and trying to transfer the program control from case 2 / case 3 to case 1.
When we execute the above visual basic program, we will get the following result below.
This is how we can use GoTo statement with Select-Case statements to transfer the program control from one case to another in visual basic programming language based on our requirements.
It’s better to avoid using GoTo statement in our visual basic applications because it will make the program logic more complex, and it’s difficult to understand the process flow of program execution.
