Slovenia[a] officially the Republic of Slovenia [b] is a country in Central Europe.[13][14] It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short coastline within the Adriatic Sea to the southwest, which is part of the Mediterranean sea.[15] Slovenia is mostly mountainous and forested,[16] covers 20,271 square kilometres (7,827 sq mi),[17] and has a population of approximately 2.1 million.[18] Slovene is the official language.[19] Slovenia has a predominantly temperate continental climate,[20] with the exception of the Slovene Littoral and the Julian Alps. Ljubljana, the capital and largest city of Slovenia, is geographically situated near the centre of the country.[21] Other larger urban centers are Maribor, Kranj, Celje and Koper.