Question entretien chez IBM : The question was "How do you swap two values without creating a new variable?"

IBM

The question was "How do you swap two values without creating a new variable?"

Utilisateur anonyme

8 mars 2013

I didn't answer the question correctly, but I looked it up later and found it: a = a XOR b b = a XOR b a = a XOR b

Utilisateur anonyme

17 août 2018

I liked solution using XOR. We can do it with +/- as well. If we know numbers are less than some integer limits. a= a + b b = a -b a = a- b