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• Variant
  ...tive function|primitive]] and [[system function]]s, and [[derived function|functions derived]] from [[primitive operator|primitive]] and [[system operator]]s, h
  5 KB (626 words) - 10:43, 11 September 2022
• Defined function (traditional)
  ...mainstream APLs. Since the 1990s other ways to [[Function styles|describe functions]] have appeared, with [[J]] and [[K]] rejecting function definition in favo In many dialects the function header syntax of defined functions is adapted to allow user-defined [[operator]]s as well. A tradfn operator c
  11 KB (1,470 words) - 22:13, 10 September 2022
• Axis
  ...x origin]]. Axis indices are used to specify [[function axis]] and in some functions such as dyadic [[Transpose]]. ...ice to put lower-order places at higher indices in the base representation functions [[Decode]] and [[Encode]]. This is known in the wider programming world as
  3 KB (444 words) - 22:29, 10 September 2022
• Comparison with traditional mathematics
  ...[Ken_Iverson#Iverson_bracket|Iverson bracket]] is implied and [[Precedence|functions have long right scope]]. In APL, all functions that only take a single argument are placed to the immediate left of their
  11 KB (1,523 words) - 22:22, 10 September 2022
• Q
  ...to which it bears great resemblance, but keywords replace most [[monadic]] functions.
  1 KB (135 words) - 19:07, 20 February 2024
• Timeline of APL primitives
  ...APL/700]] || [[Union]], [[Intersection]], [[Set Difference]] (but these functions only return unique elements), [[modified assignment]] (scalar dyadics only) ...g=apl inline>⍣</syntaxhighlight>), [[Windowed Reduction]] ([[Operators and Functions]] 1978)
  8 KB (788 words) - 17:11, 31 May 2024
• Matrix Inverse
  ...often called ''Domino'') with the dyadic function [[Matrix Divide]]. These functions were added to [[APL\360]] in 1970<ref>"Report of the APL SHARE conference" {{APL built-ins}}[[Category:Primitive functions]]
  3 KB (344 words) - 01:39, 18 March 2024
• Over
  ...Ken Iverson]]. [https://www.jsoftware.com/papers/opfns.htm ''Operators and Functions''], §8 Composition and Duality. IBM Research Report #RC7091. 1978-04-26.</
  3 KB (428 words) - 21:33, 28 January 2024
• Under
  In dialects that support user-defined operators and invertible functions, it can be defined as (or similar): ...Ken Iverson]]. [https://www.jsoftware.com/papers/opfns.htm ''Operators and Functions''], §8 Composition and Duality. IBM Research Report #RC7091. 1978-04-26.</
  5 KB (664 words) - 13:35, 17 February 2024
• APL.SV
  ...[system function]]s. APL.SV also introduced the [[Format]] and [[Execute]] functions, and the [[Scan]] operator. === Functions ===
  8 KB (747 words) - 01:28, 26 February 2024
• Kap
  * First class functions === Functions ===
  11 KB (1,055 words) - 14:37, 11 March 2024
• APL2C
  ...lang=apl inline>⎕FX</syntaxhighlight>, and can't pass arrays (rather than functions) as [[operand]]s to user-defined operators.
  4 KB (556 words) - 14:59, 10 March 2024
• Minimum
  {{APL built-ins}}[[Category:Primitive functions]][[Category:Scalar dyadic functions]]
  3 KB (415 words) - 22:23, 10 September 2022
• Semantic density
  * most primitive functions have Roman-alphabet names
  3 KB (414 words) - 06:10, 25 September 2020
• Tacit programming
  ...tradfn]]s (which have named arguments). Some APL dialects allow to combine functions into [[train]]s following a small set of rules. This allows creating comple All [[primitive functions]] are tacit. Some APLs allow primitive functions to be named.
  13 KB (1,347 words) - 21:28, 6 March 2024
• Train
  A '''function train''' is a compound function made up of a series of functions. It's written as an isolated expression (surrounded by parentheses or named ...axhighlight>, and <syntaxhighlight lang=apl inline>h</syntaxhighlight> are functions (which themselves can be tacit or not), and <syntaxhighlight lang=apl inlin
  8 KB (1,165 words) - 15:43, 8 March 2024
• Glee
  * There are no [[tradfn]]s and no [[dfn]]s. All functions are declared using blocks, which take their arguments via variable referenc ...rved words which all start with a <code>#</code>. These provide additional functions and values outside the symbolic primitives included.
  3 KB (394 words) - 22:43, 24 January 2024
• Rotate
  ...ght> and <syntaxhighlight lang=apl inline>⊖</syntaxhighlight> with monadic functions [[Reverse]] and Reverse First, respectively. {{APL built-ins}}[[Category:Primitive functions]][[Category:Functions with first- and last-axis forms]]
  5 KB (626 words) - 22:15, 10 September 2022
• Pick
  {{APL built-ins}}[[Category:Primitive functions]]
  2 KB (144 words) - 15:20, 8 November 2022
• Floor
  ...monadic]] [[scalar function]] that gives the [[wikipedia:floor and ceiling functions|floor]] of a real number, that is, the greatest integer tolerantly<ref>[[Ro {{APL built-ins}}[[Category:Primitive functions]][[Category:Scalar monadic functions]]
  5 KB (582 words) - 16:27, 24 December 2023

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