The currency symbol of the US dollar is "US$", two vertical $ refers to the US dollar, and one vertical $ refers to the currency in US dollars. For example, HK$ is Hong Kong dollars, Can$ is L Canadian dollars, and A$ is Australian dollars.

The dollar is the official currency of the United States. Its appearance is due to the passage of the coin bill of 1792. It is also widely used as a reserve currency outside the United States. At present, the issuance of US dollars is controlled by the Federal Reserve system.

Extended data:

Dollar face value:

At present, the US dollar bills in circulation are various versions of bills issued since 1929, mainly Federal Reserve bonds. The denomination of its paper money is 1, 5 10, 20, 100 yuan, and the denomination of its coins is 1, 5 10, 25 cents.

The monetary units in the United States are: US dollar ($), US cent () and rounding: $1=100;

Paper money $ 1, $5, $ 10, $20, $ 100.

Coin 1%, 5%, 10%, 25%

The competent department for issuing US dollars is Congress, and the Federal Reserve Bank is responsible for the specific issuance business. The dollar is the basic currency in foreign exchange, the main currency in international payment and foreign exchange transactions, and occupies a very important position in the international foreign exchange market.

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