The **decimal**numeral system (also called **base-ten**positional numeral system, and occasionally called **denary** or **decanary**) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral system. The way of denoting numbers in the decimal system is often referred to as *decimal notation*.

A *decimal numeral*, or just *decimal*, or casually *decimal number*, refers generally to the notation of a number in the decimal numeral system. Decimals may sometimes be identified by a decimal separator (usually “.” or “,” as in 25.9703 or 3,1415). Decimal may also refer specifically to the digits after the decimal separator, such as in “3.14 is the approximation of *π* to *two decimals*“. wikipedia.org

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