User Guide

142 ActionScript language elements
-- decrement operator
--expression
expression--
A pre-decrement and post-decrement unary operator that subtracts 1 from the expression
. The expression can be a variable, element in an array, or property of an object. The pre-
decrement form of the operator (
--expression) subtracts 1 from expression and returns
the result. The post-decrement form of the operator (
expression--) subtracts 1 from the
expression
and returns the initial value of expression (the value prior to the
subtraction).
Availability: ActionScript 1.0; Flash Lite 1.0
Operands
expression : Number - A number or a variable that evaluates to a number.
Returns
Number - The result of the decremented value.
Example
The pre-decrement form of the operator decrements
x to 2 ( x - 1 = 2) and returns the result
as
y:
var x:Number = 3;
var y:Number = --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:
var x:Number = 3;
var y:Number = x--; //y is equal to 3
The following example loops from 10 to 1, and each iteration of the loop decreases the
counter variable
i by 1.
for (var i = 10; i>0; i--) {
trace(i);
}
/ division operator
expression1 / expression2
Divides expression1 by expression2. The result of the division operation is a double-
precision floating-point number.
Availability: ActionScript 1.0; Flash Lite 1.0