Greece operates under a parliamentary government headed by the president and parliament. Greece's government has three branches, similar to the United States. The legislative and executive branches are headed by the president and parliament. The judicial branch comprises the nation's courts, which include administrative, civil and criminal courts.
Although presidential power is limited in a parliamentary government, the president has many duties, such as the formal appointment of the prime minister. The president also appoints and dismisses all other government officials based on the prime minister's recommendations. General elections are held every four years, although the parliament can be dissolved earlier.