Hi,

On page 139 of the book it talks about Logical Operators.

In the definition of Xor (^) it states that "It returns true if one of its operands is true and the other is false".

It doesnt explain how Xor returns false though.

Logically speaking, if both operands are true or both operands are false, does that return a false Xor??

Also, with OR and XOR, are you limited to only two operands for comparison? I would assume with AND you could have more than two.

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"These pretzels are making me thirsty"

Sorry, it returns false otherwise. In other words, it returns false if both are true or both are false.

The truth table is:

T ^ T = F
T ^ F = T
F ^ T = T
F ^ F = F

All of these operators take only 2 arguments (and "not" takes 1) but you can chain them together just like you can with + or -. For example:

A ^ B ^ C ^ D

is equivalent to:

((A ^ B) ^ C) ^ D

You can do similar things for || and &&.

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Rod

Rod Stephens, Microsoft MVP

Essential Algorithms: A Practical Approach to Computer Algorithms

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Thanks, that helps me alot! :)

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"These pretzels are making me thirsty"