Do Until Loop in Visual Basic .NET

Tags: VB.NET, VB 2008, VB 2010, VB 2012, VB 2013

This lesson describes how to use Do Until loop in Visual Basic .NET

One of the Do Loop statements variations is the Do Until and it keeps going until something happens (until a condition is true).

Its syntax is as follows:

Do {Until} condition
	statements
	[Exit Do]
	statements
Loop



Meaning the Until loop keeps running until the condition is satisfied. In this type of loop, there is not a control variable in itself so you have to keep track of the current position of the loop.

                    
Dim array() As Integer = {1, 3, 5, 7, 10, 20, 50}
Dim counter As Integer = array.GetUpperBound(0) + 1
Do Until counter > 0
	counter -= 1
	'print the array elements
	Console.WriteLine(array(counter))
Loop
' Visual Basic won't execute the statements because counter is already greater than 0


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