This is accomplished by using two half-adders and OR circuits. In order to add numbers in a binary system, we need to collect 3 digits by adding a previous carry to the sum of two digits. The truth table used to describe the work of a half adder is: a Since the half adder himself cannot calculate the whole result, it is combined with another half adder and OR circuit to make a full adder. The process of adding numbers in the binary system is reduced to the addition of digits, where as a result we obtain a sum and a carry. Its purpose, as the name suggests, is to add numbers. The half adder is a combination circuit of XOR and AND circuits.

It is important to note that a half adder cannot be used to add multi-digit binary numbers because there is no lower-level carry. The half adder has two input signals representing binary digits (a and b) and two output signals, one of which is the result of the addition (s), and the second the carry in higher class (C). Although adders can be constructed for various representations of numbers, such as binary coded decimal numbers, they are usually binary-numbered bitters. In many computer and other processors, adders are not only used in the arithmetic-logical unit, but also in other parts where it is necessary to calculate the address, index tables and similar operations. In electronics, the adder is a digital circuit that is adding numbers. Adders work with electrical signals representing the binary numbers of computers. In modern computers they are part of the arithmetic logical unit that is responsible for carrying out arithmetic operations. Full adder and half adder are digital circuit elements used to summarize numbers.

Half adder truth table equation