What is the purpose of carry-in in full adder? If carry in equals carry out of previous adder, then I have question

Question

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In 5th row carry out is 0 then why is carry-in equal to 1 in next adder?

This is not for the next adder. It is for the same adder. It has 3 inputs and two outputs. So yes, carry out of one adder is going into the carry-in of the next one (for the "ripple" adder topology) — Eugene Sh., May 06 '19 at 14:58
Similar but not exactly a duplicate.... What is the purpose of a “carry in”? — , May 06 '19 at 15:01

score 1 · Answer 1 · answered May 06 '19 at 15:39

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You are looking at a truth table for a single full adder. The table gives the outputs (Cout and Sum) from the inputs (A, B and Cin).

answered May 06 '19 at 15:39

Miloš Ljubotina

1 Answers1