26 lines
1016 B
Markdown
26 lines
1016 B
Markdown
# Subtract the swapped bits without temp storage
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This is more informational than a challenge. You can actually switch 2 variables with the XOR operation ^. XOR works with two arguments. It turns both arguments in their binary representation, and for each bit, returns 1 if they are different, 0 otherwise.
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Create a function to swap int variables *X* and *Y* _without the use of an additional temporary storage variable_ using _only_ [*XOR bitwise operations*][1].
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## Output
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- Return the *SUBTRACTION of swapped numbers* by [*XOR bitwise operations*][1].
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_Example_
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```text
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XOR(10, 41) ➞ 31
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XOR(69, 420) ➞ 351
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XOR(12345, 890412) ➞ 878067
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XOR(2, 1) ➞ -1
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```
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## Notes
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- The swap operation needs to be done _without the use of an additional temporary storage variable_, using _only_ [*XOR bitwise operations*][1].
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## Constraints
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- The input numbers *X* and *Y* are positive integers.
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- The input numbers *X* and *Y* are different from each other.
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[1]: https://en.wikipedia.org/wiki/Bitwise_operation#XOR |