The value null is a special data type that indicates that a variable is empty, a condition that is different from being undefined. A null variable holds no value, though it might have previously. The null type is represented literally by the identifier, null. Since ScriptEase automatically converts data types, null is both useful and versatile. The code fragment above will work if undefined is changed to null, as shown in the following:
if (test == null)
Screen.write("test is undefined")
Since null has a literal representation, assignments like the following are valid:
var test = null;
Any variable that has been assigned a value of null can be compared to the null literal.