The Indonesian rupiah is the official currency of Indonesia, a Southeast Asian country. Its currency code is IDR, and it is subdivided into 100 smaller units called sen. The rupiah is issued by the Bank Indonesia, the country's central bank, and is used for all transactions within the nation. The value of the rupiah can fluctuate due to various economic factors, including inflation and changes in the global market. Coins and banknotes come in various denominations, with banknotes being more commonly used for everyday transactions. The rupiah plays a crucial role in Indonesia's economy and trade.