Swap two integers without using a temporary variable

[DP News-Robot]

Here's a clever little algorithm you can use to swap two integers without using a temporary variable.

I rediscovered this tip, by Muhammad Saied, while reviewing my Delphi Tips micro-site.

Dunno why, but I find this strangley pleasing!

Assume we have two integers, A & B, both of which have values assigned. Swap their values like this:

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