How to: Skip to the Next Iteration of a Loop (Visual Basic)

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If you have completed your processing for the current iteration of a Do, For, or While loop, you can skip immediately to the next iteration by using a Continue Statement (Visual Basic).

Skipping to the Next Iteration

To skip to the next iteration of a For...Next loop

  1. Write the For...Next loop in the normal way.

  2. Use Continue For at any place you want to terminate the current iteration and proceed immediately to the next iteration.

    Public Function findLargestRatio(ByVal high() As Double, 
    ByVal low() As Double) As Double
    Dim ratio As Double
    Dim largestRatio As Double = Double.MinValue
    For counter As Integer = 0 To low.GetUpperBound(0)
        If Math.Abs(low(counter)) < 
           System.Double.Epsilon Then Continue For 
        ratio = high(counter) / low(counter)
        If Double.IsInfinity(ratio) OrElse 
           Double.IsNaN(ratio) Then Continue For 
        If ratio > largestRatio Then largestRatio = ratio
    Next counter
    Return largestRatio
End Function

Skipping from Within a Nested Loop

If you have Do, For, or While loops nested one within another, you can skip immediately to the next iteration of any level in the nesting. This is only true, however, when the loops are of different types. If you have nested loops of the same type, for example nested While loops, Continue While skips to the next iteration of the innermost While loop.

To skip to the next iteration of a Do loop from within a nested For loop

  1. Write the nested loops in the normal way.

  2. Use Continue Do at any place that you want to terminate the current iteration of the inner For loop and skip to the next iteration of the outer Do loop.

    Public Sub divideElements(ByRef matrix(,) As Double)
    Dim i As Integer = -1
    Do Until i > matrix.GetUpperBound(0)
        i += 1
        For j As Integer = 0 To matrix.GetUpperBound(1)
            If matrix(j, j) = 0 Then Continue Do 
            matrix(i, j) /= matrix(j, j)
        Next j
    Loop 
End Sub

See Also

Tasks

How to: Transfer Control Out of a Control Structure (Visual Basic)

How to: Run Several Statements Repeatedly (Visual Basic)

How to: Run Several Statements for Each Element in a Collection or Array (Visual Basic)

How to: Improve the Performance of a Loop (Visual Basic)

Reference

While...End While Statement (Visual Basic)

Do...Loop Statement (Visual Basic)

For...Next Statement (Visual Basic)

Concepts

Loop Structures (Visual Basic)

Nested Control Structures (Visual Basic)

Other Resources

Control Flow in Visual Basic