It was a poor attempt at a joke. !! is C's "make boolean" operator. (Okay not really an operator in and of itself, more like a combination operator, like -->

It was a poor attempt at a joke. !! is C's "make boolean" operator. (Okay not really an operator in and of itself, more like a combination operator, like --> being the "down to" operator.) https://stackoverflow.com/questions/10307281/c-operator-is-a-two-not https://stackoverflow.com/questions/10307281/c-operator-is-a...