When a law is considered unconstitutional, it means that it violates principles set forth in a country's constitution. This determination may result from judicial review, wherein courts assess the compatibility of laws with constitutional provisions, such as fundamental rights or separation of powers. If a law is deemed unconstitutional, it is rendered void and cannot be enforced, protecting citizens from governmental overreach or discrimination. Such findings also provide a framework for legal precedent and guide future legislative actions. The process underscores the importance of rule of law and constitutional governance in a democracy.