In the ancient time there was no money in use as the value of goods in those days goods were exchanged for goods this i called barter system there were demerite of this barter system to remove its demerits money has come into existence money is that which money does any particular thing is money if it serves the primary function of money it serves function of medium of exchange it is the money through which the value of goods is expressed there is a classification of money actual money and unit of account there is another classification of money legal tender money optional money and subsidiary money again money paper is classified into standard and token money paper money consists of bank notes there are coins made of precious metals to be used as money these are used as money for the settlement of fractions of accounts it is a function of four media standard measure and store it measure the unit price of a commodity the value of money money plays an important part in the economy of a country no country can think without it in different countries of the world different kinds of money in the name of taka, rupee, dollar, pound, yen, derham, etc are used in the settlement of transaction money is used.