228 Chapter 12: ActionScript Dictionary
Example
The pre-decrement form of the operator decrements x to 2 (x - 1 = 2), and returns the result
as
y:
x = 3;
y = --x;
//y is equal to 2
The post-decrement form of the operator decrements x to 2 (x - 1 = 2), and returns the original
value of
x as the result y:
x = 3;
y = x--
//y is equal to 3
++ (increment)
Availability
Flash Player 4.
Usage
++expression
expression++
Parameters
None.
Returns
A number.
Description
Operator (arithmetic); a pre-increment and post-increment unary operator that adds 1 to
expression. The expression can be a variable, element in an array, or property of an object.
The pre-increment form of the operator (
++expression) adds 1 to expression and returns the
result. The post-increment form of the operator (
expression++) adds 1 to expression and
returns the initial value of
expression (the value prior to the addition).
The pre-increment form of the operator increments
x to 2 (x + 1 = 2), and returns the result
as
y:
x = 1;
y = ++x
//y is equal to 2
The post-increment form of the operator increments x to 2 (x + 1 = 2), and returns the original
value of
x as the result y:
x = 1;
y = x++;
//y is equal to 1
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