Switzerland has a population of around 7.7 million people, with foreigners making up 21% of residents. The country has four national languages - German, French, Italian, and Romansh. Christianity is the dominant religion. Some of the largest cities are Zurich and Geneva. The culture is diverse and characterized by folk music, yodeling, the alphorn instrument, and sports like football, water sports, skiing, and hiking. The geography is varied with the Jura mountains, plateau, and Alps regions, over 1,500 lakes, and a temperate climate. The economy relies on skilled labor in fields like technology, banking, and tourism.