February 25, 2021
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The IIf function

  • By John Percival
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Have you come across the IIf function? This is what help says:


IIf(expr, truepart, falsepart)

The IIf function syntax has these named arguments:

Part Description
expr Required. Expression you want to evaluate.
truepart Required. Value or expression returned if expr is True.
falsepart Required. Value or expression returned if expr is False.

Then you would use it as follows:

MsgBox "Hello " & IIf(strName="John", _
"John", "some one else") & ". How are you?", vbOK

This is a very mundane example, but you get the idea: it can save a lot of code if you just want to evaluate something little. Did you know that it is part of the VBA DLL? This means that if you are only writing a small prgram that does not use anything else from the VBA library then you could cut out this DLL. This is how:

Public Function IIf2(arg As Boolean, _
ret1 As Variant, ret2 As Variant) As Variant
If arg Then
    IIf2 = ret1
    IIf2 = ret2
End If
End Function

This article was originally published on November 20, 2002

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