This is a list of numeral systems, that is, writing systems for expressing numbers.
Devanagari 0 १ २ ३ ४ ५ ६ ७ ८ ९
Numeral systems are classified here as to whether they use positional notation (also known as place-value notation), and further categorized by radix or base.
The common names are derived somewhat arbitrarily from a mix of Latin and Greek, in some cases including roots from both languages within a single name.
The common names of the negative base numeral systems are formed using the prefix nega-, giving names such as:
All known numeral systems developed before the Babylonian numerals are non-positional.