Exclusive or (XOR)

The "exclusive or" operator is very important in cryptography.

XOR, or "exclusive or" operates on binary data. It returns true if both of its inputs are opposites (one false and one true), otherwise, it returns false. You may see the operator written this way: ⊕.

Assignment

Write a function xor() that takes two boolean values as input and returns the result of the "exclusive or" operation.