wa da neyaaa adder de rok shaaa...dear we need binary parallel full adder in which the next result depend on the prevoius result but u did;t touch that..thats y da neya kus de
I guess you are referring to step where (B'C + BC' ) is written as ( B xor C ). If yes... Then that is because of Boolean equivalency. Refer to this link for more detailed understanding www.allaboutcircuits.com/textbook/digital/chpt-7/the-exclusive-or-function-xor/
