Funzione IIf

Restituisce uno dei due possibili risultati di una funzione, in base al valore logico dell'espressione valutata.

Sintassi:


IIf (Bool As Boolean, Variant1 As Variant, Variant2 As Variant) As Variant

Parametri:

Bool: Any expression that you want to evaluate. If the expression evaluates to True, the function returns the value of Variant1, otherwise it returns the value of Variant2.

Variant1, Variant2: Any expression, one of which will be returned as the function result, depending on the logical evaluation.

note

IIf evaluates both Variant1 and Variant2 even if it returns only one of them. If one of the expressions results in error, the function returns the error. For example, do not use IIF to bypass a possible division by zero result.


Codici di errore:

5 Richiamo di procedura non valido

Esempio:


REM restituisce al massimo 3 valori
Function Max (A As Double, B As Double, C, As Double) As Double
    Max = IIf( A >= B, A, B)
    Max = IIf( C >= Max, C, Max)
End Function
REM uso sbagliato della funzione IIf
Function Inverse(A As Double) As Double
    Inverse = IIf( A = 0, 0, 1/A )
End Function

Istruzione If o Select Case

Funzione Switch