C Programming - Bitwise Operators - Discussion

As we know that truth table of AND is if 2 number is true then only output becomes true. For that reason & is used to find bits on or off.

Yaa, & operator is perfect for find out on or off.

Hai frndz. How & operator is used to check whether a bit is on or off is as follows let us conceive that there is a binary num 10101000 if you want to check third bit is on or off then perform and operation to 00001000 then if 3rd bit is 1 its on else its turned off.

Here if wana check nth bit make n-1 bit as 1 remaining as 0. Then perform and operation then you will know the answer.

Hey anybody can explain me how & operatoer is used to chek on or off ?

I don't understand this.

Hi! Guys this is a simple one. Let consider 8-bit binary number,

Binary(8 bit) = 0000 1100
suppose we want check 3rd bit is on or off(on=1 & off=0), just like this,

0000 1100 (Decimal=12)
&
0000 0100 (Decimal=4,we are checking 3rd bit so it is 1)
----------
0000 0100 (Decimal=4)
----------
If we got some value then checking bit is on,otherwise off.
In C language,

if(12&4)
print("The third bit is on");
else
print("The third bit is off");

What is the difference between && and & ?

&& is a relational operator it compare two values.

Whereas & is logical operator.

Relation operator is used to make an expression to compound one whereas bitwise and is used to operate on bits for faster access.

In detail,,
The key difference between & and && is ,its return value
EX; 1&2 returns zero whereas 1&&2 returns one ..
check out
1=0001 & 0010= 0000 on & opertion
and 1(true) and 2(true) so 1&& 2=1(true)