System Variables and Functions

This contains a list of all quad variables and quad functions. The difference between a quad variable and a quad function is that a value may be assigned to a quad variable. A value cannot be assigned to a quad function.

System Variables
⎕ALX	Attention Latent Expression
⎕CT	Comparison Tolerance
⎕DM	Diagnostic Message (Read-only)
⎕DT	Distribution Type
⎕ELX	Error Latent Expression
⎕FC	Format Control
⎕FEATURE	Feature Control
⎕FPC	Floating Point Control
⎕IC	Indeterminate Control
⎕IO	Index Origin
⎕LR	Left-Right Direction Choice
⎕LX	Latent Expression
⎕PP	Print Precision
⎕PR	Prompt Replacement
⎕PW	Print Width
⎕RL	Random Link
⎕SA	Stop Action
⎕WSID	Workspace Identifier

Niladic System Functions
⎕A	The alphabet from A to Z, also Á to Ź,  to Ẑ, À to À, Ä to Z and à to Z, all in lowercase, too using the variations ⎕a ⎕A ⎕á ⎕Á ⎕à ⎕À ⎕â ⎕ ⎕ä ⎕Ä ⎕ã ⎕Ã
⎕AV	Atomic Vector
⎕CS	Collating sequence
⎕EM	Event Message
⎕ET	Event Type
⎕LC	Line Counter
⎕NNAMES	Names of Open Native Files
⎕NNUMS	Tie Numbers of Open Native Files
⎕SI	State Indicator
⎕SYSID	System Identifier
⎕SYSVER	System Version
⎕T	Tickcount
⎕TC	Terminal Control Characters
⎕TCBEL	Terminal Control Character, Bell
⎕TCBS	Terminal Control Character, Backspace
⎕TCESC	Terminal Control Character, Escape
⎕TCFF	Terminal Control Character, Form Feed
⎕TCHT	Terminal Control Character, Horizontal Tab
⎕TCLF	Terminal Control Character, Line Feed
⎕TCNL	Terminal Control Character, New Line
⎕TCNUL	Terminal Control Character, Null
⎕TS	Time Stamp
⎕WA	Workspace Available
Monadic or dyadic system functions
⎕AT	Attributes
⎕CR	Canonical representation
⎕DC	Data Conversion
⎕DFT	Discrete Fourier Transform
⎕DL	Delay or pause APL processing
⎕DR	Data representation
⎕EA	Execute alternate
⎕EC	Execute controlled
⎕ERROR	Signal error
⎕ES	Event simulate
⎕EX	Expunge names
⎕FMT	Format
⎕FX	Function fix
⎕MF	Monitor function
⎕NAPPEND	Append data to an open native file
⎕NC	Name classification
⎕NCREATE	Create and open a native file
⎕NERASE	Erase an open native file
⎕NINFO	Native file information
⎕NL	Name list
⎕NREAD	Read data from an open native file
⎕NRENAME	Rename an open native file
⎕NREPLACE	Replace data in an open native file
⎕NRESIZE	Resize an open native file
⎕NSIZE	Get the size of an open native file
⎕NTIE	Open a native file
⎕NUNTIE	Close a native file
⎕STOP	Stop execution of a user-defined function/operator/hyperator or Magic Function
⎕TF	Transfer form
⎕TRACE	Trace execution of a user-defined function/operator/hyperator or Magic Function
⎕UCS	Universal character set
⎕VR	Vector representation of a function

See Also
System Commands	System Variables and Functions	Operators

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