VB.NET Exit Statement

In VB.NET, the Exit statement is used to terminate the loop (for, while, do, select case, etc.) or exit the loop and pass control immediately to the next statement of the termination loop. Furthermore, the Exit statement can also be used in the nested loop to stop or terminate the execution of the inner or outer loop at any time, depending on our requirements.

Syntax

The flow of Exit Statement

Following is the diagrammatical representation of Exit Statement in VB.NET programming language.

Generally, the Exit statement is written along with a condition. If the Exit condition is true inside the loop, it exits from the loop and control transfer to the next statement, followed by the loop. And if the Exit condition fails for the first time, it will not check any statement inside the loop and terminates the program.

We will now see how to use the Exit statement in loops and Select case statements to finish the program's execution in the VB.NET programming language.

Use of Exit statement in While End loop

Example 1: Write a simple program to use the Exit Statement in While End loop.

Exit_While.vb

Imports System
Module Exit_While
    Sub Main()
        ' Definition of count variable
        Dim count As Integer = 1

        ' Execution of While loop
        While (count < 10)
            ' Define the Exit condition using If statement
            If count = 5 Then
                Exit While ' terminate the While loop 
            End If
            Console.WriteLine(" Value of Count is : {0}", count)
            count = count + 1
        End While
        Console.WriteLine(" Exit from the While loop when count = {0}", count)
        Console.WriteLine(" Press any key to exit...")
        Console.ReadKey()
    End Sub
End Module

Output:

In the above example, the While End loop is continuously executed, its body until the given condition While (count < 10) is not satisfied. But when the Exit condition (count = 5) falls inside a while loop, the execution of the loop is automatically terminated, and control moves to the next part of the loop statement.

Use of Exit statement in For Next loop

Example 2: Write a program to calculate the sum of 10 numbers, and if a negative number is entered, the For Each loop ends.

Imports System
Module Exit_For
    Sub Main()
        'Definition of num variable
        Dim num As Integer
        Dim sum As Double = 0.0

        'Execution of For loop
        For i As Integer = 1 To 10
            'Accept a number from the user
            Console.WriteLine("Enter a number : ")
            num = Console.ReadLine()
            ' If the user enters a negative number, the loop terminates
            If num < 0 Then
                Exit For ' terminate the For loop 
            End If
            sum += num
        Next
        
        Console.WriteLine(" Exit from the For loop when (num < 0) is: {0}", num)
        Console.WriteLine(" Total sum is : {0}", sum)        
        Console.WriteLine(" Press any key to exit from the Console Screen")
        Console.ReadKey()
    End Sub
End Module

Output:

The above program accepts a number from the user until it encounters a negative or less than 0 (num < 0). And when there is a negative number, the Exit statement terminates the loop, and the control transfer to the next part of the loop.

Use of Exit statement in Do While loop

Example 3: Write a simple program to use the Exit Statement in Do While Loop.

Exit_Do_While.vb

Imports System
Module Exit_Do_While
    Sub Main()
        'Definition of the count variable
        Dim count As Integer = 20

        ' Definition of Do While loop
        Do
            'Define the Exit condition using If statement.

            If count = 25 Then
                Exit Do ' terminate the Do While loop 
            End If
            Console.WriteLine(" Value of Count is : {0}", count)
            count = count + 1
        Loop While (count < 50)
        Console.WriteLine(" Exit from the Do While loop when count = {0}", count)
        Console.WriteLine(" Press any key to exit...")
        Console.ReadKey()
    End Sub
End Module

Output:

In the above example, the Do While loop is continuously executed, its body until the given condition While (count < 50) is not satisfied. But when the Exit condition (count = 25) is encountered, the Do While loop is automatically terminated. The control is immediately transferred to the next statement, followed by the loop statements.

Next TopicVB.NET Continue Statement

← prev next →