Subtraction Assignment Operator - MACROMEDIA FLASH 8-FLASH LITE 2.X ACTIONSCRIPT LANGUAGE Reference

Availability: ActionScript 1.0; Flash Lite 1.0
Operands
expression1 : Number
expression2 : Number
Returns
- An integer or floating-point number.
Number
Example
Usage 1: The following statement reverses the sign of the expression 2 + 3:
trace(-(2+3)); // output: -5
Usage 2: The following statement subtracts the integer 2 from the integer 5:
trace(5-2); // output: 3
The result, 3, is an integer. Usage 3: The following statement subtracts the floating-point
number 1.5 from the floating-point number 3.25:
trace(3.25-1.5); // output: 1.75
The result, 1.75, is a floating-point number.

-= subtraction assignment operator

expression1 -= expression2
Assigns
expression1
two statements are equivalent:
x -= y ; x = x - y;
String expressions must be converted to numbers; otherwise,
Availability: ActionScript 1.0; Flash Lite 1.0
Operands
expression1 : Number
expression2 : Number
Returns
- The result of the arithmetic operation.
Number
- A number or expression that evaluates to a number.
- A number or expression that evaluates to a number.
the value of
expression1- expression2
- A number or expression that evaluates to a number.
- A number or expression that evaluates to a number.
. For example, the following
(not a number) is returned.
NaN
Operators 175