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 that 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();
}

Comments

Lost Angel Online said on Feb 18, 2005 at 10:31 AM :

Can I use null to delete an Array?

myArray = new Array(999)
myArray = null

Does it work like this?

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