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Author: djpmsft

articles/data-factory/data-flow-expression-functions.md

@@ -320,7 +320,7 @@ Based on a condition applies one value or the other. If other is unspecified it
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 ### <code>iifNull</code>
 <code><b>iifNull(<i>&lt;value1&gt;</i> : any, [<i>&lt;value2&gt;</i> : any], ...) => any</b></code><br/><br/>
-Checks if the first parameter is null. If not null, the value is returned. If null, the parameter is returned. If three parameters are specified, the behavior is the same as iif(isNull(value1), value2, value3) and the third parameter is returned.  
+Checks if the first parameter is null. If not null, the first parameter is returned. If null, the second parameter is returned. If three parameters are specified, the behavior is the same as iif(isNull(value1), value2, value3) and the third parameter is returned if the first value is not null.  
 * ``iifNull(10, 20) -> 10``  
 * ``iifNull(null, 20, 40) -> 20``  
 * ``iifNull('azure', 'data', 'factory') -> 'factory'``