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The If...Else Statement
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If...Else forma altrimenti alternativa della dichiarazione consente l'azione sia sulle circostanze false che allineare. La disposizione è data qui sotto:

If condition Then

...statements

Else

...statements

End If



Qui, secondo i risultati della prova di circostanza, lo scritto prende le linee di condotta alternative. Se l'espressione è valutata come allineare, allora subito dopo regolato delle dichiarazione è eseguito e se l'espressione è valutata come falsa, l'insieme delle dichiarazione che seguono l'altro è eseguito. Quindi, una di due azioni d'elaborazione differenti avviene allo stesso tempo.

Lo scritto sotto è un esempio del If...Else forma di prova di circostanza.

Sub Check_Button (Src As Object, Args As CommandEventArgs)

If Args.CommandName = "First Button" Then
Message.Text = "You clicked the first button."
Else
Message.Text = "You clicked the second button."
End If

End Sub

<asp:Button Text="Click Me" runat="server"
OnCommand="Check_Button" CommandName="First Button"/>
<asp:Button Text="Click Me" runat="server"
OnCommand="Check_Button" CommandName="Second Button"/>
<asp:Label id="Message" runat="server"/>



Nesting If Statements

Due o più di due se le dichiarazione possono essere annidate e cioè se la dichiarazione può comparire parte interna se dichiarazione, che può comparire parte interna se dichiarazione, e così via. In una forma generale questi hanno annidato se le dichiarazione compaiono come sotto.

If condition Then

If condition Then

If condition Then
...statements
Else
...statements
End If

Else

If condition Then
...statements
Else
...statements
End If

End If

End If





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Keywords: The If...Else Statement in vb.net, switch case statement, while loop statement, select case statement, java statement, value statement, switch statement, case statement, function statement, nested statement, loop statement, command statement, condition statement, null statement


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Gnome Quiz
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Time Management Quiz
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Team Work Quiz
Leadership Skills Quiz
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