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Boolean Operator

 
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Hi,

What is the diffrence between "!=" and "=!" operartor.
As per me this operartor can only be applied on boolean first of all.
Also if

b1 != b2; //line 1
here , its doing comparison between b1 and b2.
If they are not equal to each other then line 1 return true otherwise false.

b1 =! b2; // line 2
Here its doing assignment b2 to b1.
That is if b2 is "false" then due to (!b2) true is going to get assign to b1.

Am I right?

***************************************************************************

One more thing I want to ask-

boolean b1=false;
boolean b2=false;

b2!=b1!=b2; //Line 1
b2!=b1=!b2; //Line 2

Are these 2 lines going to compile and run?
For me its giving error stating "Invalid statement".
Also I am confused.
Please help me out with the above two.

Thanks
[ March 09, 2008: Message edited by: sandhi mridul ]
 
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What is the diffrence between "!=" and "=!" operartor.


The second is not an operator but rather two operators '=' and '!'.
For better readability try: b1 = !b2;
 
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Originally posted by sandhi mridul:
Hi,

What is the diffrence between "!=" and "=!" operartor.
As per me this operartor can only be applied on boolean first of all.
Also if

b1 != b2; //line 1
here , its doing comparison between b1 and b2.
If they are not equal to each other then line 1 return true otherwise false.

b1 =! b2; // line 2
Here its doing assignment b2 to b1.
That is if b2 is "false" then due to (!b2) true is going to get assign to b1.

Am I right?

***************************************************************************

One more thing I want to ask-

boolean b1=false;
boolean b2=false;

b2!=b1!=b2; //Line 1
b2!=b1=!b2; //Line 2

Are these 2 lines going to compile and run?
For me its giving error stating "Invalid statement".
Also I am confused.
Please help me out with the above two.

Thanks

[ March 09, 2008: Message edited by: sandhi mridul ]





Hi Sandhi,
what you said is rite.
is comparision and
is Assigment
Instead of this
you can use as


moreover,i dont know why the following check needed
its enough to have as

you may try down as

 
sandhi mridul
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Thanks Hamsagayathri.
But still not sure if line 1 and 2 going to compile or not.
I found these in 2 diffrent mock test with diffrent answers.
I tried but giving Compiler error.
So just need to conform.

boolean b1=false;
boolean b2=false;

b2!=b1!=b2; //Line 1
b2!=b1=!b2; //Line 2
 
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