~~NOTOC~~
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====== xor ======
XOR

===== Description =====
Pops two items from the stack, treats them as boolean values, ‘xors’ them, and pushes 0 or 1 back to the stack. If both items are TRUE, 0 is pushed to the stack. If both items are FALSE, 0 is pushed to the stack. If one item is TRUE and the other is FALSE, 1 is pushed to the stack.

===== Examples =====
<code 4rpl>
if (1 xor (false))
    trace("1 xor false is true")
endif
</code>
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