When the supreme court declares a law unconstitutional is?

When the Supreme Court declares a law unconstitutional, it means that the law is found to violate the principles set forth in the Constitution. This ruling effectively invalidates the law, rendering it unenforceable. Such decisions uphold the rule of law and protect individual rights, as the Supreme Court interprets the Constitution as the supreme legal authority. This process is a key function of judicial review, which allows the Court to check the powers of the legislative and executive branches.