Bitwise NOT operator in the programming world usually takes one number and returns the inverted bits of that number as shown below:
Bitwise NOT of 1 = 0 Bitwise NOT of 0 = 1
Input : X = 010101 Output : Bitwise NOT of X = 101010
But Golang doesn’t have any specified unary Bitwise NOT(~) or you can say Bitwise Complement operator like other programming languages(C/C++, Java, Python, etc). Here, you have to use Bitwise XOR(^) operator as Bitwise NOT operator. But how?
Let’s understand how Bitwise XOR takes in any two equal length bit patterns and performs Exclusive OR operation on each pair of corresponding bits.
1 XOR 1 = 0 1 XOR 0 = 1 0 XOR 0 = 0 0 XOR 1 = 1
Here, you can see the result of XOR(M, N) = 1 only if M != N else it will be 0. So here, we will use the XOR operator as a unary operator to implement the one’s complement to a number.
In Golang, suppose you have a given bit M, so ^M = 1 ^ M which will be equal to one’s complement or you can say the Bitwise NOT operator result.
Example: Suppose you have the given bits as 010101.
Input: 11111111 XOR 00001111 Output: 11110000
Here, you can see, if we simply solve the Bitwise Not of 00001111 then it will be equal to 11110000.