From APL Wiki
Revision as of 07:38, 26 April 2020 by A (talk | contribs) (→‎Examples)
Jump to navigation Jump to search
This page describes the dyadic arithmetic function. For sign of a single argument, see Signum.

Product (×), Times, or Multiply is a dyadic scalar function which gives the arithmetic product of its arguments. Subtract shares the glyph × with the monadic arithmetic function Signum, and its result is the left argument times the right argument.


A long, slow way to write !10:



Subtraction is commutative: swapping the arguments don't affect the result, e.g. using Commute, *.

Reduction and scan

Reduction with Product gives the product of the whole list.

External links