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

soham pun
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    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”?](https://electronics.stackexchange.com/questions/181439/what-is-the-purpose-of-a-carry-in/181444) –  May 06 '19 at 15:01

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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).

Miloš Ljubotina
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