Flash CS3 Documentation

ActionScript 2.0 Language Reference > ActionScript language elements > Operators > >>> bitwise unsigned right shift operator

>>> bitwise unsigned right shift operator

expression1 >>> expression2

The same as the bitwise right shift (>>) operator except that it does not preserve the sign of the original expression because the bits on the left are always filled with 0.

Floating-point numbers are converted to integers by discarding any digits after the decimal point. Positive integers are converted to an unsigned hexadecimal 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 hexadecimal 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.

Availability: ActionScript 1.0; Flash Player 5

Operands

expression1 : Number - A number or expression to be shifted right.

expression2 : Number - A number or expression that converts to an integer between 0 and 31.

Returns

Number - The result of the bitwise operation.

Example

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); // output: 2147483647 

This is because -1 decimal is 11111111111111111111111111111111 binary (thirty-two 1s), and when you shift right (unsigned) by 1 bit, the least significant (rightmost) bit is discarded, and the most significant (leftmost) bit is filled with a 0. The result is 01111111111111111111111111111111 binary, which represents the 32-bit integer 2147483647.

See also

>>= bitwise right shift and assignment operator

Flash CS3