(Bitwise Right Shift) - MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference

>> (bitwise right shift)
Availability
Flash Player 5.
Usage
expression1 >> expression2
Parameters
expression1
expression2
Returns
A 32-bit integer.
Description
Operator (bitwise); converts
bits in
expression1
the conversion of
the sign of the original
bit (the bit farthest to the left) of
bit is 1. Shifting a value right by one position is the equivalent of dividing by 2 and discarding
the remainder.
Floating-point numbers are converted to integers by discarding any digits after the decimal point.
Positive integers are converted to an unsigned hex value with a maximum value of 4294967295 or
0xFFFFFFFF; values larger than the maximum have their most significant digits discarded when
they are converted so the value is still 32-bit. Negative numbers are converted to an unsigned hex
value via the two's complement notation, with the minimum being -2147483648 or
0x800000000; numbers less than the minimum are converted to two's complement with greater
precision and also have the most significant digits discarded.
The return value is interpreted as a two's complement number with sign, so the return value will
be an integer in the range -2147483648 to 2147483647.
For more information, see "Operator precedence and associativity" in Using ActionScript in Flash.
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.
A number or expression to be shifted right.
A number or expression that converts to an integer from 0 to 31.
expression1
to the right by the number of places specified by the integer that results from
. Bits that are shifted off the right end are discarded. To preserve
expression2
, the bits on the left are filled in with 0 if the most significant
expression
expression1
and to 32-bit integers, and shifts all the
expression2
is 0, and filled in with 1 if the most significant
>> (bitwise right shift) 87