In a parlimentary system of government what official is equivalent to the president of the US?

In a parliamentary system of government, the official equivalent to the President of the United States is typically the Prime Minister. The Prime Minister is the head of government and is responsible for running the government and implementing laws, while the head of state may be a monarch or a ceremonial president with limited powers. The Prime Minister is usually elected from the majority party in the parliament and is accountable to the legislature.