The currency in Iran, or the money used, is called the rial (pronounced ‘reeyaal’). The rial is like the dollar or a pound in that is made up of 100 pieces, in Iran called dinars. However, due to high inflation one riyal is worth so little that no fraction of it is really used on a day to day basis.
The rial (ISO 4217 code IRR) is the currency of Iran. It is subdivided into 100 dinar but, because of the very low current value of the rial, no fraction of the rial is used in accounting.
Although the "toman" is no longer an official unit of Iranian currency, Iranians commonly express amounts of money and prices of goods in "tomans." For this purpose, one "toman" equals 10 rials. Despite this usage, amounts of money and prices of goods are virtually always written in rials. For example, the sign next to a loaf of bread in a store would state the price in rials, e.g., "200 Rials," even though the clerk, if asked, would say that the bread costs "20 tomans."
There is no official symbol for the currency but the Iranian standard ISIRI 820 defined a symbol for use on typewriters (mentioning that it is an invention of the standards committee itself) and the two Iranian standards ISIRI 2900 and ISIRI 3342 define a character code to be used for it.
The rial was first introduced in 1798 as a coin worth 1250 dinar or one eighth of a toman. In 1825, the rial ceased to be issued, with the qiran of 1000 dinars (one tenth of a toman) being issued as part of a decimal system. The rial replaced the qiran at par in 1932, although it was divided into one hundred (new) dinars.