Half adder

Design a half adder that is a circuit that performs the addition of two binary digits, a and b. It outputs the sum and the output carry.

Specification

module halfadder(a, b, sum, carry);
    input a, b;
    output sum, carry;

Input

• a and b are the two input values.

Output

• sum is the least significant digit of $a + b$.

• carry is the output carry, i.e., the most significant digit of $a + b$.

Problem information

Author: Javier de San Pedro Martín

Generation: 2026-02-03T12:13:01.814Z

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