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Variable Switch

Logic puzzles require you to think. You will have to be logical in your reasoning.


Puzzle ID:#49422
Fun:** (1.94)
Difficulty:*** (2.31)
Submitted By:rob77*ca*****!




You're a computer programmer, and the program you're writing has numeric variables A and B. You need the computer to switch the variables so that the number in variable A becomes variable B, and the number in variable B becomes variable A. Adding a third variable would use more memory though, so how can you do that switch without using another variable? Use commands such as B=B-A to assign a new value to B.

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