Consider an up/down counter that counts between 0 and 15, if external input(X) is “0” the counter counts upward (0000 to 1111) and if external input (X) is “1” the counter counts downward (1111 to 0000), now suppose that the present state is “1100” and X=1, the next state of the counter will be

Digital logic is the underlying logic system that drives electronic circuit board design. Digital logic manipulates of binary values through printed circuit board technology that uses circuits and logic gates to construct the implementation of computer operations.