If...Then...Else Statement

Defines one or more statement blocks that you only want to execute if a given condition or expression is True.

Syntaksi:

If...EndIf statement


  If condition Then 
      statements
  [{ElseIf} condition Then
      statements]
  [Else 
      statements]
  {EndIf|End If}

Instead of End If you can write EndIf.

tip

If statements can be shortened to one line when using single statement blocks.



  If condition Then statement [Else statement]

Parametrit:

The If...Then statement executes program blocks depending on given conditions. When LibreOffice Basic encounters an If statement, the condition is tested. If the condition is True, all subsequent statements up to the next Else or ElseIf statement are executed. If the condition is False, and an ElseIf statement follows, LibreOffice Basic tests the next expression and executes the following statements if the condition is True. If False, the program continues either with the next ElseIf or Else statement. Statements following Else are executed only if none of the previously tested conditions were True. After all conditions are evaluated, and the corresponding statements executed, the program continues with the statement following EndIf.

Useita If...Then -lauseita voi asettaa sisäkkäin.

Else- ja ElseIf-lauseet ovat valinnaisia.

Varoitus-kuvake

GoTo- tai GoSub-käskyä voi käyttää If...Then-lohkosta poistumiseen, muttei If...Then-rakenteeseen sisään siirtymiseen.


Esimerkki:

Seuraavassa esimerkissä on mahdollista syöttää tuotteen vanhentumispäivä ja määrittää, onko vanhentumispäivä jo ohitettu.


Sub ExampleIfThenDate
    Dim sInput As String
    Dim dInput As Date
 
  On Error Goto inputError
    sInput = InputBox("Enter the expiration date (YYYY-MM-DD)")
    dInput = DateValue(sInput)
 
    If dInput < Date() Then
        MsgBox "Vanhentumispäivä on ohitettu"
    ElseIf dInput > Date() Then
        MsgBox "Vanhentumispäivä ei ole vielä mennyt"
    Else
        MsgBox "Vanhentumispäivä on tänään"
    End If
 
inputError:
    If dInput = 0 Then MsgBox "Invalid input"
End Sub

Select Case statement

Iif or Switch functions

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