Returns one of two possible function results, depending on the logical value of the evaluated expression.
IIf (Expression, ExpressionTrue, ExpressionFalse)
Expression: An expression that you want to evaluate. If the expression evaluates to True, the function returns the result of ExpressionTrue, otherwise it returns the result of ExpressionFalse.
ExpressionTrue, ExpressionFalse: Any expressions, one of which will be returned as the function result, depending on the logical evaluation.