Iranian Rial
The rial (in Persian: ریال; ISO 4217 code IRR) is the currency of Iran and currently remains the world's least valued currency unit.
The name derives from the Spanish Real, which was for several centuries, the currency in Spain (derived from Spanish rey = king).
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., "10,000 Rials," even though the clerk, if asked, would say that the bread costs "1,000 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 Unicode Standard has a compatibility character defined U+FDFC ﷼ rial sign (HTML: ﷼).