Javascript Tilde & Two's complement

Question

Two\'s complement method - generates -(x + 1).

for example when JavaScript encounters the Tilde he uses this method:

~5 = -(5+1) = -6         


        

Answer 1

Two's complement method - generates -(x + 1).

Simply put, two's complement does not generate -(x + 1). One's complement does (i.e., ~ / bitwise NOT / flipping the bits).

Two's compliment (flip the bits, add 1) is the (-0 averse) operation/encoding we use to express a negative number in pure bits (and derive it therefrom). Two's complement of x will generate -x.

~5 is nothing more than flipping the bits 0000 0101 to 1111 1010.

To determine the value of 1111 1010, we flip back to 0000 0101 and add 1: 0000 0110 (-6).