MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE, Reference

Page: 35 / 1378

Constants 35
Constants
A constant is a variable used to represent a property whose value never changes. This section
describes global constants that are available to every script.
Constants summary
false constant
A unique Boolean value that represents the opposite of
true
.
When automatic data typing converts
false
to a number, it becomes 0; when it converts
false
to a string, it becomes
"false"
.
Availability: ActionScript 1.0; Flash Player 5
Example
This example shows how automatic data typing converts
false
to a number and to a string:
var bool1:Boolean = Boolean(false);
// converts it to the number 0
trace(1 + bool1); // outputs 1
Modifiers Constant Description
false
A unique Boolean value that represents the opposite
of
true
.
Infinity
Specifies the IEEE-754 value representing positive
infinity.
-Infinity
Specifies the IEEE-754 value representing negative
infinity.
NaN
A predefined variable with the IEEE-754 value for
NaN (not a number).
newline
Inserts a carriage return character (
\r
) that generates
a blank line in text output generated by your code.
null
A special value that can be assigned to variables or
returned by a function if no data was provided.
true
A unique Boolean value that represents the opposite
of
false
.
undefined
A special value, usually used to indicate that a
variable has not yet been assigned a value.