Logic gates are fundamental building blocks of digital circuits, used to perform logical operations on one or more binary inputs to produce a single output. They operate based on Boolean algebra, which involves true (1) and false (0) values. Common types of logic gates include AND, OR, and NOT, each serving a specific function in processing information. These gates can be combined to create complex circuits, enabling computers and other electronic devices to perform calculations and make decisions. For example, a combination of AND and OR gates can be used in adders to perform arithmetic operations. Understanding logic gates is essential for anyone studying computer science or electrical engineering.