ActionScript 2.0 Language Reference - Adobe Help and Support

var v:Number = 0;
var z:Number = 0;
v = v + 4 , z++, v + 6;
trace(v); // output: 4
trace(z); // output: 1
The following example is identical to the previous example except for the addition of the
parentheses () operator, which changes the order of operations such that the comma operator
is evaluated before the assignment (=) operator:
var v:Number = 0;
var z:Number = 0;
v = (v + 4, z++, v + 6);
trace(v); // output: 6
trace(z); // output: 1
See also
() parentheses operator
add concatenation (strings) operator
string1 add string2
Deprecated since Flash Player 5. Adobe recommends that you use the add (+) operator when
creating content for Flash Player 5 or later. This operator is not supported in Flash Player 8 or
later.
Concatenates two or more strings. The add (+) operator replaces the Flash 4 & operator; Flash
Player 4 files that use the & operator are automatically converted to use the add (+) operator
for string concatenation when brought into the Flash 5 or later authoring environment. Use
the add (+) operator to concatenate strings if you are creating content for Flash Player 4 or
earlier versions of the Player.
Availability: ActionScript 1.0; Flash Player 4
Operands
string1 : String - A string.
string2 : String - A string.
Returns
String - The concatenated string.
See also
+ addition operator
158 ActionScript language elements