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You can also "nest" IIf expressions, allowing you to evaluate a series of dependent expressions. Use IIf in complex expressions You can use any expression as any part of an IIf statement. When you open the form in Form view, the control displays "Italian" whenever the value for CountryRegion is Italy, and "Some other language" whenever CountryRegion is any other value.
=IIf(="Italy", "Italian", "Some other language") You can add a control and use IIf in its Control Source property, like so: In a form, you want to denote whether Italian is the first language of the contact. Use IIf on a form or report Suppose you have a Customers table that contains a field named CountryRegion. For example, if evaluating falsepart results in a division by zero error, an error occurs even if expr is True. Because of this, you should watch for undesirable side effects. IIf always evaluates both truepart and falsepart, even though it returns only one of them. Value or expression returned if expr is False. Value or expression returned if expr is True. The IIf function syntax has these arguments: If the expression is true, IIf returns one value if it is false, IIf returns another. You use IIf to determine if another expression is true or false. You can use IIf anywhere you can use expressions. Returns one of two parts, depending on the evaluation of an expression.
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