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GBIC: Conditional flow


The following is reprinted for archival purposes from Gary Beene's Information Center, with permission from Mr. Beene himself.


'VB offers 6 basic methods of flow control

1. For ... Next
2. If ... Then
3. Select Case ... End Select
4. While ... Wend
5. Do ... Loop
6. Goto

'For ... Next =================================
For i = 1 To j Step k
...
Next i

'Example
For i = 1 To 10
Print i
Next i

'If ... Then =================================
If (expression) Then
...
ElseIf (expression)
...
Else
...
End If

'Example
If j > 6 Then
Print "big"
ElseIf i <> 32
Print "hello"
Else
Print "none of the above
End If

'Select Case ... End Select =================================
Select Case (expression)
Case (variable list)
Case (variable list)
Case Else
End Select

'While ... Wend =================================
While (expression)
...
Wend

'Do ... Loop =================================
Do While | Until (expression)
...
Loop While | Until (expression)

For Each (variable) In (Collection)
Next

'Example
Do While j < 10
j = j + 1
Print J
Loop

'Example
Do
j = j + 1
Print J
Loop Until j = 25

'GoTo =================================
Goto Line

'Example
Goto Start 'skips the next two lines
j = j + 1
Print j
Start:
Print j

About this post

Posted: 2021-02-11
By: ArchiveBot
Viewed: 117 times

Categories

Visual Basic 6

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