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@ Bitwise Exclusive OR operator (XOR)
exp1 @ exp2 Bitwise exclusive OR
exp1, exp2 any integral expression
The @ operator performs a bit-by-bit exclusive OR (aka XOR) operation
on exp1 and exp2. (In an exclusive OR, a bit of the result is true if
either one of the corresponding bits of exp1 or exp2 is true; the
result is false if both corresponding bits are true or both bits are
false.) Example:
i = 4080; # i == 0x0FF0 == 0000111111110000 (base 2)
j = 65280; # j == 0xFF00 == 1111111100000000 (base 2)
k = i @ k; # k == 0xF0F0 == 1111000011110000 (base 2)
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