Interaction.IIf(Boolean, Object, Object) Method

Reference

Definition

Namespace:: Microsoft.VisualBasic

Assembly:: Microsoft.VisualBasic.Core.dll

Assembly:: Microsoft.VisualBasic.dll

Source:: Interaction.vb

Source:: Interaction.vb

Source:: Interaction.vb

Important

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

public:
 static System::Object ^ IIf(bool Expression, System::Object ^ TruePart, System::Object ^ FalsePart);

public static object? IIf(bool Expression, object? TruePart, object? FalsePart);

public static object IIf(bool Expression, object TruePart, object FalsePart);

static member IIf : bool * obj * obj -> obj

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

Parameters

Expression: Boolean

Required. Boolean. The expression you want to evaluate.

TruePart: Object

Required. Object. Returned if Expression evaluates to True.

FalsePart: Object

Required. Object. Returned if Expression evaluates to False.

Returns

Object

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

Examples

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.

Remarks

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

Applies to

Product	Versions
.NET	Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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