Class Microsoft.VisualBasic.Interaction Syntax Dim result As Object = IIf(expression, truePart, falsePart)
expression (required; Boolean) Expression to be evaluated
truePart (required; any value or expression) Expression or value to return if expression is true
falsePart (required; any value or expression) Expression or value to return if expression is False
Description The IIf function returns one of two results, depending on whether expression evaluates to true or False. Usage at a Glance The IIf function, as shown in the syntax listed above, is generally equivalent to: If expression Then Return truePart Else Return falsePart End If
truePart and falsePart can be variables, constants, literals, expressions, or function calls. expression can also be built from many complex elements, as long as it ultimately results in a Boolean value. Both truePart and falsePart are fully evaluated before they are considered as results for the IIf statement. If they contain function calls, those functions will be called, even in the part that is not returned by the IIf function. For instance, in the statement: result = IIf(tempOnly, ProcessFile(tempFileName), _ ProcessFile(mainFileName))
both calls to ProcessFile will always be performed, regardless of the value of tempOnly. However, the return value from only one of the calls will be returned from the IIf function.
See Also If...Then...Else Statement |
