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re: How can you swap two variables without using a third? VIEW POST

FULL DISCUSSION
 

(Posting before reading the other comments) I came up with two solutions, not sure if there's any reason either would be considered superior:

a = a + b
b = b - a
a = a + b
b = -b
a = a + b
b = b + a
a = b - a
b = b - 2*a
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