The President of Brazil, officially the President of the Federative Republic of Brazil , or simply the President of the Republic, is both head of state and head of government of the Federative Republic of Brazil. The president leads the executive branch of the federal government and is the commander-in-chief of the Brazilian Armed Forces. The presidential system was established in 1889, upon the proclamation of the republic in a military coup d'état against Emperor Pedro II. Since then, Brazil has had six constitutions, three dictatorships, and three democratic periods. During these democratic periods, voting has always been compulsory. The Brazilian Federal Constitution, along with several constitutional amendments, establishes the requirements, powers, and responsibilities of the president, as well as the term of office and method of election.