Double (volleyball) to record one, most likely when a match exceeds three sets, particularly five-set matches. Triple double is defined as an individual performance in which a player accumulates a double digit number total during one match in three of five statistical categories, aces, kills, blocks, digs, and assists. The most common way for a player to achieve a triple-double is with kills, blocks, and digs, usually attained by hitters (i.e., middle blockers, outside hitters, or opposite hitters) who are skilled defensively. Occasionally, setters record a triple-double, typically combining assists, digs, and either kills or blocks. A triple-double is a rare event,
Quadruple-precision floating-point format the double-double technique above, although that technique does not implement IEEE quadruple precision), since direct hardware support for quadruple precision is, as of 2016, less common (see "Hardware support" below). One can use general arbitrary-precision arithmetic libraries to obtain quadruple (or higher) precision, but specialized quadruple-precision implementations may achieve higher performance. A separate question is the extent to which quadruple-precision types are directly incorporated into computer programming languages. Quadruple precision is specified in Fortran by the codice_2 (module codice_3 from Fortran 2008 must be used, the constant codice_4 is equal to 16 on most processors), or as codice_5, or in