MACROMEDIA FLASH 8-FLASH LITE 2.X ACTIONSCRIPT LANGUAGE - Newline Constant; Null Constant

Constants 29
newline constant
Inserts a carriage return character (\r) that generates a blank line in text output generated by
your code. Use
newline to make space for information that is retrieved by a function or
statement in your code.
Availability: ActionScript 1.0; Flash Lite 1.1
Example
The following example shows how
newline displays output from the trace() statement on
multiple lines.
var myName:String = "Lisa", myAge:Number = 30;
trace(myName+myAge);
trace("-----");
trace(myName+newline+myAge);
// output:
Lisa30
-----
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.
Availability: ActionScript 1.0; Flash Lite 1.1
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();
}