Pakistan is a country located in South Asia. It is bordered by India to the east, Afghanistan and Iran to the west, and China to the north. Pakistan has a population of approximately 220 million people, and its capital and largest city is Islamabad. Pakistan is a federal parliamentary republic, and it is the sixth-most populous country in the world. The economy of Pakistan is primarily based on agriculture, and the country is a leading producer of cotton, wheat, and other crops. Pakistan is a nuclear-armed country, and it has a long and complex history that has been shaped by its strategic location at the crossroads of Asia and the Middle East.