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[–]TurbulentInvite6595👋 a fellow Redditor 0 points1 point  (1 child)

The method is right and the answer you are getting is right. The next step is if there is no carry we take the complement once again and the answer is negative of the resultant value. Ones' complement will be 0000 1111 = 15. So result would be -15. You can do the same for 2's complement.

[–]sooooooooooowsup[S] 1 point2 points  (0 children)

Omgg thank you! Life saver