FLASH® LITE™ 2.x - Adobe Help and Support

Lisa
30
See also
trace function
null 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();
}
true constant
A unique Boolean value that represents the opposite of false. When automatic data typing
converts true to a number, it becomes 1; when it converts true to a string, it becomes
"true".
Example
The following example shows the use of true in an if statement:
var shouldExecute:Boolean;
// ...
// code that sets shouldExecute to either true or false goes here
// shouldExecute is set to true for this example:
shouldExecute = true;
if (shouldExecute == true) {
trace("your statements here");
}
// true is also implied, so the if statement could also be written:
// if (shouldExecute) {
// trace("your statements here");
// }
Constants 29