The President of Brazil, officially the President of the Federative Republic of Brazil or simply the President of the Republic, is both the head of state and the head of government of the Federative Republic of Brazil.
Head of government is a generic term used for either the highest or second highest official in the executive branch of a sovereign state, a federated state, or a self-governing colony who often presides over a cabinet.
A head of state or Chief of State is the highest-ranking position in a sovereign state and is vested with powers to act as the chief public representative of that state.
A president is the leader of a country or a division or part of a country, typically a republic, a democracy, or a dictatorship.
Obama Welcomes Brazil's President by Associated Press
The president leads the executive branch of the federal government and is the commander-in-chief of the Brazilian Armed Forces.
A commander-in-chief is the person or body that exercises supreme operational command and control of a nation's military forces or significant elements of those forces.
The Brazilian Armed Forces is the unified military organization comprising the Brazilian Army, the Brazilian Navy and the Brazilian Air Force.
The executive is the organ exercising authority in and holding responsibility for the governance of a state.
President Obama and the President of Brazil Hold a Joint Press Conference by The Obama White House
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.
A presidential system is a system of government where a head of government is also head of state and leads an executive branch that is separate from the legislative branch.
The Constitution of Brazil, along with several constitutional amendments, establishes the requirements, powers, and responsibilities of the president and term of office and the method of election.
A constitution is a set of fundamental principles or established precedents according to which a state or other organization is governed.