If...Then...Else Statement

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

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

Instead of Else If you can write ElseIf, instead of End If you can write EndIf.

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

  If condition Then statement [Else statement]

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.

Soovi korra saab pesastada mitu If...Then lauset.

Else ja ElseIf laused pole kohustuslikud.

Lausete GoTo ja GoSub abil saad lause If...Then sisust väljuda, kuid ei saa plokki If...Then siseneda.

Järgmises näites kirjeldatakse toote aegumiskuupäeva sisestamist ja aegumiskuupäeva möödumise kindlaksmääramist.

Sub ExampleIfThenDate
    Dim sDate As String
    Dim sToday As String
    sDate = InputBox("Sisesta aegumiskuupäev (MM.DD.YYYY)")
    sDate = Right$(sDate, 4) + Mid$(sDate, 4, 2) + Left$(sDate, 2)
    sToday = Date$
    sToday = Right$(sToday, 4)+ Mid$(sToday, 4, 2) + Left$(sToday, 2)
    If sDate < sToday Then
        MsgBox "Aegumiskuupäev on möödas"
    ElseIf sDate > sToday Then
        MsgBox "Aegumiskuupäev pole veel möödas"
    Else
        MsgBox "Aegumiskuupäev on täna"
    End If
End Sub