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x <<= y (x = x << y)x >>= y (x = x >> y)x >>>= y (x = x >>> y)x &= y (x = x & y)x ^= y (x = x ^ y)x |= y (x = x | y)What do these different operators do?
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The | (bitwise inclusive OR) operator compares the values (in binary format) of each operand and yields a value whose bit pattern shows which bits in either of the operands has the value 1 . If both of the bits are 0 , the result of that bit is 0 ; otherwise, the result is 1 .
Bitwise operators are usually applied to define flag values in operating systems and driver software. For instance, in a file property, the read-only mode is conceptually expressed as a flag bit in the operating system, and the bitwise operator is used to toggle between the true and the false value.
<<, >>
Bit shift left and right, respectively. If you imagine the left operand as a binary sequence of bits, you are shifting those to the left or right by the number of bits indicated by the right operand.
&, ^, |
These are bitwise and, xor, and or, respectively. You can think of & and | as the counterparts to && and ||, except that they will treat their operands as bit vectors, and perform the logical operations on each of the bits. There is no ^^ operator, but this operation is "xor" or "exclusive or". You can think of "a xor b" as "a or b, but not both".
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