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A full adder is a device used to add two binary numbers. A full adder has three inputs (A, B, Cin) and two outputs(S(um), Cout). You can connect more full adders by connecting Cin on one adder and Cout on another to add more numbers.

A compact full adder:


Truth tableEdit

Inputs Outputs
A B Cin Cout S
0 0 0 0 0
1 0 0 0 1
0 1 0 0 1
1 1 0 1 0
0 0 1 0 1
1 0 1 1 0
0 1 1 1 0
1 1 1 1 1