Times
Revision as of 13:45, 30 April 2020 by Marshall (talk  contribs) (Text replacement  "{{APL builtins}}" to "{{APL builtins}}Category:Primitive functions")
 This page describes the dyadic arithmetic function. For sign of a single argument, see Signum.
×

Times (×
), Multiply, or Product is a dyadic scalar function which gives the arithmetic product of its arguments. Times shares the glyph ×
with the monadic arithmetic function Signum.
Examples
A long, slow way to write !10
, assuming ⎕IO←1
:
×/⍳10
Properties
Multiplication is commutative and associative, but, due to floating point error, may result in small differences between mathematically equivalent expressions.
The identity element for Times is 1
.
Reduction
Reduction with Multiply gives the product of the whole list.