Null Generate a runtime error. Boolean Create a new Boolean object whose default value is the value of the boolean. See section 15.6 for a description of Boolean objects. Number Create a new Number object whose default value is the value of the number. See section 15.7 for a description of Number objects.
String Create a new String object whose default value is the value of the string.
See section 15.5 for a description of String objects. All rights reserved.