What does the ^ operator do to a BOOL?

Question

What does this statement mean?

isChecked = isChecked ^ 1;

isChecked is a BOOL.

Answer 1

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.