Operators 127
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.
Availability: ActionScript 1.0; Flash Lite 2.0
Operands
expression1 : Number - A number or expression to be shifted left.
expression2 : Number - A number or expression that converts to an integer from 0 to 31.
Returns
Number - The result of the bitwise operation.
Example
In the following example, the integer 1 is shifted 10 bits to the left:
x = 1 << 10 The result
of this operation is
x = 1024. This is because 1 decimal equals 1 binary, 1 binary shifted left
by 10 is 10000000000 binary, and 10000000000 binary is 1024 decimal. In the following
example, the integer 7 is shifted 8 bits to the left:
x = 7 << 8 The result of this operation is x
= 1792
. This is because 7 decimal equals 111 binary, 111 binary shifted left by 8 bits is
11100000000 binary, and 11100000000 binary is 1792 decimal. If you trace the following
example, you see that the bits have been pushed two spaces to the left:
// 2 binary == 0010
// 8 binary == 1000
trace(2 << 2); // output: 8
See also
>>= bitwise right shift and assignment operator, >> bitwise right shift
operator
, <<= bitwise left shift and assignment operator, >>> bitwise
unsigned right shift operator
, >>>= bitwise unsigned right shift and
assignment operator
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