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IIf Function 

Returns one of two objects, depending on the evaluation of an expression.


Public Function IIf( _
   ByVal Expression As Boolean, _ 
   ByVal TruePart As Object, _ 
   ByVal FalsePart As Object _ 
) As Object

Parameters

Expression

Required. Boolean. The expression you want to evaluate.

TruePart

Required. Object. Returned if Expression evaluates to True.

FalsePart

Required. Object. Returned if Expression evaluates to False.

The IIf function provides a counterpart for the ternary Conditional Operator: ? : in Visual C++.

This example uses the IIf function to evaluate the testMe parameter of the checkIt procedure and returns the word "Large" if the amount is greater than 1000; otherwise, it returns the word "Small".

Function checkIt(ByVal testMe As Integer) As String
    Return CStr(IIf(testMe > 1000, "Large", "Small"))
End Function

Note that if Option Strict is On, you must use the CStr keyword to explicitly convert the return from Object to String.

Namespace: Microsoft.VisualBasic

Module: Interaction

Assembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)

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