What does the ^ operator do to a BOOL?

Question

What does this statement mean?

isChecked = isChecked ^ 1;

isChecked is a BOOL.

Answer 1

"^" is called an exclusive OR or XOR operation. In this case, it will change boolean from true to false and vice-versa.

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Answer 2

it will XOR isChecked with 1 so I suppose true ^ 1 = 0(false) and false ^1 = 1(true)

Answer 3

this is bitwise XOR operator and changes 0 to 1, and 1 to zero. see all opertors here.

Answer 4

The "^" is an exclusive OR operation, so 0 flips to 1, and 1 flips to zero. The result should be the same as isChecked = !isChecked.

Answer 5

Everyone is saying it XORs the bool-- that's true-- but the purpose here is that it's toggling the bool.

The advantage of doing a bitwise toggle like this is speed and the ability to fiddle bits in extreme detail.

for more Bitwise Operators

Answer 6

It only flips the last bit of BOOL. Not a reliable way to logically negate. If someone is crazy enough to set the a BOOL variable to some number, for example 5. Then doing ^ 1 will only flip the last bit of the value to 4, which is still evaluated to YES.

If you want to logically negate, use ! operator instead.