User command

User commands^[1] or user-defined commands^[2] are a way for a user to introduce new commands in addition to system commands.

The benefit of using user commands is that they can be executed without having to explicitly copy their code into the active workspace.^[1]

APL user commands start with a right bracket, e.g., <source lang=apl inline>]yourcommand</syntaxhighlight>.

In Dyalog APL, many useful user commands are included into the distribution, e.g., <source lang=apl inline>]boxing on</syntaxhighlight>, <source lang=apl inline>]plot</syntaxhighlight>, etc. Special command <source lang=apl inline>] -?</syntaxhighlight> allows to see a full list of user commands.

External links

↑ ^1.0 ^1.1 UI Guide – User Commands – Dyalog APL
↑ 3.14 User-defined Commands – GNU APL

APL syntax [edit]
General	Comparison with traditional mathematics ∙ Precedence ∙ Tacit programming (Train, Hook, Split composition)
Array	Numeric literal ∙ String ∙ Strand notation ∙ Object literal ∙ Array notation (design considerations)
Function	Argument ∙ Function valence ∙ Derived function ∙ Derived operator ∙ Niladic function ∙ Monadic function ∙ Dyadic function ∙ Ambivalent function ∙ Defined function (traditional) ∙ Dfn ∙ Function train
Operator	Operand ∙ Operator valence ∙ Tradop ∙ Dop ∙ Derived operator
Assignment	Multiple ∙ Indexed ∙ Selective ∙ Modified
Other	Function axis ∙ Bracket indexing ∙ Branch ∙ Statement separator ∙ Quad name ∙ System command ∙ User command ∙ Keyword ∙ Dot notation ∙ Function-operator overloading ∙ Control structure ∙ Comment

[dal-1] 1.0 ^1.1 UI Guide – User Commands – Dyalog APL

[2] 3.14 User-defined Commands – GNU APL

[1]

[2]

User command

External links

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