I need help with C# operators

Question

I've got a program that compares 2 boolean values, say, conditionX, and conditionY.

Both are initially set to false, but after a series of switches at least one of them becomes true.

I need to test both conditionX and conditionY. If either one of them comes out as true, then the test returns true, but if both of them return false, the test returns false.

And here's the part I need help with. If both of them return true, the test MUST return FALSE.

And, here, I'm drawing a blank. I know the AND operator will only return true, if both are true, while the OR operator will return true if at least one of them returns true.

Is there an operator that will return false if both of them return true/false, but will return true if at least one of them is true?

anthony sottile · Accepted Answer · 2011-07-28 23:27:49Z

8

Try XOR

if(statement1 ^ statement2)
    doSomething();

answered Jul 28, 2011 at 23:27

anthony sottile

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Comments

Rune FS · Accepted Answer · 2011-07-28 23:36:29Z

7

Use an xor

conditionX ^conditionY

edited Jul 28, 2011 at 23:36

answered Jul 28, 2011 at 23:27

Rune FS

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Comments

GalacticCowboy · Accepted Answer · 2011-07-28 23:35:11Z

5

You can Use the ^ operator.

http://msdn.microsoft.com/en-us/library/zkacc7k1%28v=VS.100%29.aspx

edited Jul 28, 2011 at 23:35

GalacticCowboy

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answered Jul 28, 2011 at 23:27

Jeyara

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4 Comments

Rune FS Over a year ago

Why the -1 (+1 because I think it's bizare)

Kirk Woll Over a year ago

@Rune, I didn't DV, but the operator is not forward-slash back-slash. It is the caret: ^

Jeyara Over a year ago

Its my mistake. Actually i mean caret. Sorry guys. But my link points to correct one.

GalacticCowboy Over a year ago

Yeah, I fixed the post. It was obvious what you meant, even if you didn't use the right character.

CharithJ · Accepted Answer · 2011-07-29 00:57:37Z

5

Use the preferred one from below. They are listed as per my preference.

conditionX ^ conditionY
// OR
conditionX != conditionY
// OR
(conditionX || conditionY) && !(conditionX && conditionY)

answered Jul 29, 2011 at 0:57

CharithJ

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Comments

MRAB · Accepted Answer · 2011-07-28 23:28:09Z

3

Try this: conditionX != conditionY.

answered Jul 28, 2011 at 23:28

MRAB

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Comments

Dave · Accepted Answer · 2011-07-28 23:27:28Z

0

if you know that true==1 and false==0, then you can appily a bitwise xor ^. otherwise simply use

(a||b)&&(!a||!b)

answered Jul 28, 2011 at 23:27

Dave

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1 Comment

GalacticCowboy Over a year ago

In C#, the ^ works for boolean without worrying about what "true" or "false" represents numerically.

trailmax · Accepted Answer · 2011-07-28 23:28:26Z

0

XOR

answered Jul 28, 2011 at 23:28

trailmax

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