Exit While. We use Exit in a While-loop. This program contains 4 Console.WriteLine statements. These help us locate the control flow as it proceeds through the statements.
Info Statement A is reached when the program begins. B is reached only once because the loop body is only entered once.
And C is not reached because the Exit While statement is first encountered. Statement D is reached after the Exit While statement is hit.
Module Module1
Sub Main()
Console.WriteLine("A")
Dim i As Integer = 10
While True
Console.WriteLine("B")
If i = 10 Then
Exit While
End If
Console.WriteLine("C")
End While
Console.WriteLine("D")
End Sub
End ModuleA
B
D
Exit Sub. In this next example, we see the Exit Sub statement. This statement breaks out of the entire Sub. This is the same as a Return statement.
Also Exit Sub is an alternative syntax to Return. If a While-loop contains an Exit While, the Exit Sub is more symmetric to this.
Module Module1
Sub Main()
Console.WriteLine("A")
Dim i As Integer = 10
While True
Console.WriteLine("B")
If i = 10 Then
Exit Sub
End If
Console.WriteLine("C")
End While
Console.WriteLine("D")
End Sub
End ModuleA
B
Discussion. In the C# language, a break statement exits from an enclosing loop. Break is the same as Exit. But in VB.NET Exit can be used instead of Return.
Also The Exit For statement does the same thing as the Exit While statement but acts upon a For-loop construct.
Tip These different statements are useful when nested. We can even Exit from a loop that is not immediately enclosing the statement.
Detail As with other loop Exit statements, Exit Do breaks out of an enclosing Do loop.
A summary. In VB.NET, we use Exit statements to stop procedural units from executing. This is simpler than attempting to set loop variables to an out-of-range value to cause loop termination.
Dot Net Perls is a collection of pages with code examples, which are updated to stay current. Programming is an art, and it can be learned from examples.
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This page was last updated on Jun 20, 2023 (edit).