Bitwise Operators in C/C++

By Md Shoriful Islam

Bitwise Operators in C/C++


In C, the following 6 operators are bitwise operators (also known as bit operators as they work at the bit-level). They are used to perform bitwise operations in C.




The & (bitwise AND) in C or C++ takes two numbers as operands and does AND on every bit of two numbers. The result of AND is 1 only if both bits are 1.

The | (bitwise OR) in C or C++ takes two numbers as operands and does OR on every bit of two numbers. The result of OR is 1 if any of the two bits is 1.

The ^ (bitwise XOR) in C or C++ takes two numbers as operands and does XOR on every bit of two numbers. The result of XOR is 1 if the two bits are different.

The << (left shift) in C or C++ takes two numbers, the left shifts the bits of the first operand, and the second operand decides the number of places to shift.

The >> (right shift) in C or C++ takes two numbers, right shifts the bits of the first operand, and the second operand decides the number of places to shift.

The ~ (bitwise NOT) in C or C++ takes one number and inverts all bits of it.

Let’s look at the truth table of the bitwise operators.

       X       

       Y       

       X & Y       

       X | Y       

       X ^ Y       

0

0

0

0

0

0

1

0

1

1

1

0

0

1

1

1

1

1

1

0


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