# Ternary numeral system

## Base-3 numeral system / From Wikipedia, the free encyclopedia

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A **ternary** /ˈtɜːrnəri/ numeral system (also called **base 3** or **trinary**) has three as its base. Analogous to a bit, a ternary digit is a **trit** (**tri**nary dig**it**). One trit is equivalent to log_{2} 3 (about 1.58496) bits of information.

Although *ternary* most often refers to a system in which the three digits are all non–negative numbers; specifically 0, 1, and 2, the adjective also lends its name to the balanced ternary system; comprising the digits −1, 0 and +1, used in comparison logic and ternary computers.