Start
A = 9B = 5A = A + B Then
A is 14B is 5B = A - BThen
A is 14B is 9A = A - B Result:
A(5) is now B
B(9) is now A
Not really simpler then just using a third variable but i works!
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Answer by Jens Krüger for R: Swap two variables without using a third
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