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

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IBM

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

Anonymous

8 Mar 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

Anonymous

17 Aug 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