Number class 569
null
Availability
Flash Player 5.
Usage
null
Parameters
None.
Returns
Nothing.
Description
Constant; a special value that can be assigned to variables, or returned by a function if no data
was provided. You can use
null to represent values that are missing or do not have a defined
data type.
Example
In a numeric context, null evaluates to 0. Equality tests can be performed with null. In this
statement, a binary tree node has no left child, so the field for its left child could be set to
null.
if (tree.left == null) {
tree.left = new TreeNode();
}
Number class
Availability
Flash Player 5 (became a native object in Flash Player 6, which improved
performance significantly).
Description
The Number class is a simple wrapper object for the Number data type. You can manipulate
primitive numeric values by using the methods and properties associated with the Number class.
This class is identical to the JavaScript Number class.
You must use a constructor when calling the methods of a Number object, but you do not need to
use the constructor when calling the properties of a Number object. The following examples
specify the syntax for calling the methods and properties of a Number object.
The following example calls the
toString() method of a Number object, which returns the
string “1234”.
myNumber = new Number(1234);
myNumber.toString();
This example calls the MIN_VALUE property (also called a constant) of a Number object:
smallest = Number.MIN_VALUE
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