Droit administratif is indeed known as the administrative law of France. Let's break down the answer and explain it in detail:

- Administrative Law: Administrative law refers to the body of law that governs the activities of administrative agencies of the government. It regulates the relationship between the government and its citizens, ensuring that administrative actions are conducted within the bounds of law and in accordance with procedural fairness.

- Definition of Droit Administratif: Droit administratif is a French term that translates to "administrative law" in English. It is a specific branch of law that deals with the legal principles and rules governing the administration and functioning of the French government.

- Origin and Development: Droit administratif originated in France during the 19th century. It was a response to the growing power and complexity of the administrative state, which required a specialized legal framework to regulate administrative actions and protect citizens' rights. Over time, droit administratif developed into a distinct field of law with its own principles, procedures, and court system.

- Key Principles: Droit administratif is characterized by several key principles that differentiate it from other branches of law. These principles include the principle of legality (which requires administrative actions to be based on a legal foundation), the principle of separation of powers (which ensures a clear distinction between the executive, legislative, and judicial functions), and the principle of judicial review (which allows for the review of administrative decisions by specialized administrative courts).

- Role and Scope: Droit administratif plays a crucial role in regulating the activities of the French government and ensuring accountability and fairness in administrative actions. It covers a wide range of areas, including public administration, public procurement, public services, administrative contracts, and the protection of individual rights against the state. It also provides mechanisms for citizens to challenge administrative decisions through administrative appeals and judicial review.

- Significance: Droit administratif is considered one of the cornerstones of the French legal system. Its principles and concepts have influenced administrative law in many other countries, particularly in civil law jurisdictions. It has also been a source of inspiration for the development of administrative law in international organizations such as the European Union.

In summary, droit administratif is the administrative law of France. It is a specialized branch of law that governs the administration and functioning of the French government, ensuring that administrative actions are conducted within the bounds of law and in accordance with procedural fairness.