C Programming - Bitwise Operators - Discussion

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

&& is a relational operator it compare two values.

Whereas & is logical operator.

What is the difference between && and & ?

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");

I don't understand this.

Hey anybody can explain me how & operatoer is used to chek 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.

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

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.