MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE Reference page 126

Example
The following example converts 65535 to a 32-bit integer and shifts it 8 bits to the right:
var x:Number = 65535 >> 8;
trace(x); // outputs 255
The following example shows the result of the previous example:
var x:Number = 255
This is because 65535 decimal equals 1111111111111111 binary (sixteen 1's),
1111111111111111 binary shifted right by 8 bits is 11111111 binary, and 11111111 binary is
255 decimal. The most significant bit is 0 because the integers are 32-bit, so the fill bit is 0.
The following example converts -1 to a 32-bit integer and shifts it 1 bit to the right:
var x:Number = -1 >> 1;
trace(x); // outputs -1
The following example shows the result of the previous example:
var x:Number = -1
This is because -1 decimal equals 11111111111111111111111111111111 binary (thirty-two
1's), shifting right by one bit causes the least significant (bit farthest to the right) to be discarded
and the most significant bit to be filled in with 1. The result is
11111111111111111111111111111111 (thirty-two 1's) binary, which represents the 32-bit
integer -1.
See also
>>= (bitwise right shift and assignment)
>>= (bitwise right shift and assignment)
Availability
Flash Player 5.
Usage
expression1 >>= expression2
Parameters
expression1
expression2
Returns
A 32-bit integer.
Description
Operator (bitwise compound assignment); this operator performs a bitwise right-shift operation
and stores the contents as a result in
126 Chapter 5: ActionScript Core Language Elements
A number or expression to be shifted right.
A number or expression that converts to an integer from 0 to 31.
expression1
.