System Function NL

Quad Name List - ⎕NL     (System Function)

Monadic Function

Z←⎕NL R returns a character matrix of the names of variables, functions, operators, etc. where R = 2 (variables), 3 (functions), 4 (operators), etc.

R is an integer scalar or vector consisting of the name classes whose names should be returned in Z. For a complete list of Name Classes, see the description of Quad Name Classification ⎕NC.

Z is a character matrix of user objects in the workspace, each row being a name in the workspace.

Quad Names List sample monadic calls:

      ⎕NL 3     ⍝ list function names in the active workspace
      ⎕NL 2     ⍝ list variable names in the active workspace
      ⎕NL 3 2   ⍝ list function AND variable names in the active workspace
      ⍴⎕NL 3    ⍝ The shape of names list - 1st element returned(# rows) shows the "user Function Count" in the active workspace

---

List all APL Quad ⎕ System Variables (per APL Standard):

      ⎕NL 5
⎕alx    
⎕ct     
⎕dm     
⎕dt     
⎕elx    
⎕fc     
⎕feature
⎕fpc    
⎕ic     
⎕io     
⎕lx     
⎕pp     
⎕pr     
⎕pw     
⎕rl     
⎕sa     
⎕wsid   

---

List all APL Quad ⎕ System Functions (per APL Standard):

      ⎕NL 6
⎕a       
⎕at      
⎕av      
⎕cr      
⎕d       
⎕dl      
⎕dr      
⎕ea      
⎕ec      
⎕em      
⎕error   
⎕es      
⎕et      
⎕ex      
⎕fmt     
⎕fx      
⎕lc      
⎕mf      
⎕nappend 
⎕nc      
⎕ncreate 
⎕nerase  
⎕nl      
⎕nlock   
⎕nnames  
⎕nnums   
⎕nread   
⎕nrename 
⎕nreplace
⎕nresize 
⎕nsize   
⎕ntie    
⎕nuntie  
⎕sysid   
⎕sysver  
⎕t       
⎕tc      
⎕tcbel   
⎕tcbs    
⎕tcesc   
⎕tcff    
⎕tcht    
⎕tclf    
⎕tcnl    
⎕tcnul   
⎕tf      
⎕ts      
⎕ucs     
⎕vr      
⎕wa     

---

NARS has added additional features over and beyond APL's standard ⎕NL. Magic Functions are in some ways for advanced APL programmers and or NARS developers - or anyone with a great idea to improve APL's functionality, see NARS Discussion Board on topics such as New Primitive Operators. To see all magic functions available in NARS use the following:

      ⎕NL 23 24     ⍝ list all Magic Functions and Operators
#BoxFMT         
#Conform        
#DydConv        
#DydDnShoe      
#DydDomino      
#DydDotDot      
#DydEpsUnderbar 
#DydIota        
#DydIotaUnderbar
#DydLRShoeUnd   
#DydRank        
#DydScan        
#DydScan1       
#DydUpShoe      
#IdnConv        
#IdnDot         
#IdnJotDot      
#MAD            
#MDIU           
#MEO            
#MI             
#MIO            
#MLRS           
#MLRSU          
#MM             
#MMUL           
#MonDnShoe      
#MonDomino      
#MonDot         
#MonDotAll      
#MonDotCr       
#MonDotMf       
#MonDotPerm     
#MonFMT         
#MonIota        
#MonRank        
#MonVR          
#MSD            
#MU             
#RoS2           
#RoS1L          
#RoS1R          
#SD             
      ⎕NL 23
#BoxFMT         
#Conform        
#DydDnShoe      
#DydDomino      
#DydDotDot      
#DydEpsUnderbar 
#DydIota        
#DydIotaUnderbar
#DydLRShoeUnd   
#DydUpShoe      
#IdnDot         
#MAD            
#MDIU           
#MEO            
#MI             
#MIO            
#MLRS           
#MLRSU          
#MM             
#MMUL           
#MonDnShoe      
#MonDomino      
#MonDotAll      
#MonDotMf       
#MonDotPerm     
#MonFMT         
#MonIota        
#MonVR          
#MSD            
#MU             
#SD             
      ⎕NL 24
#DydConv  
#DydRank  
#DydScan  
#DydScan1 
#IdnConv  
#IdnJotDot
#MonDot   
#MonDotCr 
#MonRank  
#RoS2     
#RoS1L    
#RoS1R    

Most magic functions are transparent to you the APL user since they implement APL symbol functionality; however, they enhance APL's functionality, ref. ⎕FMT.

---

Dyadic Function

Z←L ⎕NL R returns a character matrix of the names of user variables, functions, operators, etc. where R = 2 (variables), 3 (functions), 4 (operators), etc.

R is one of more of 2 (variables), 3 (functions), 2 3 (both functions and variables), etc. For a complete list of Name Classes, see the description of Quad Name Classification ⎕NC.

L is a letter or letters for limiting the names list, i.e. which begin with the letter(s) to show.

Quad Names List sample dyadic calls:

      "A" ⎕NL 3     ⍝ List all function names beginning with A.
      "M" ⎕NL 2     ⍝ List all variable names beginning with M.
      "AC" ⎕NL 3 2  ⍝ List all function AND variable names beginning with letter "A" and also letter "C".

Function ⎕NL may be used inside user functions whereas system commands )FNS and )VARS cannot be used inside a user function.

See Also: Quad Name Classification ⎕NC

Note: ⎕NL is available as both a monadic and dyadic form system function, you cannot assign a value to it.

System Variables (A value may be assigned to these except for ⎕DM)
⎕ALX	⎕CT	⎕DM	⎕DT	⎕ELX	⎕FC	⎕FEATURE	⎕FPC	⎕IC	⎕IO
⎕LR	⎕LX	⎕PP	⎕PR	⎕PW	⎕RL	⎕SA	⎕WSID
Niladic System Functions (a value cannot be assigned to these)
⎕A	⎕AV	⎕EM	⎕ET	⎕LC	⎕NNAMES	⎕NNUMS	⎕SI	⎕SYSID	⎕SYSVER
⎕T	⎕TC	⎕TCBEL	⎕TCBS	⎕TCESC	⎕TCFF	⎕TCHT	⎕TCLF	⎕TCNL	⎕TCNUL
⎕TS	⎕WA
Monadic or dyadic system functions (a value cannot be assigned to these)
⎕AT	⎕CR	⎕DC	⎕DFT	⎕DL	⎕DR	⎕EA	⎕EC	⎕ERROR	⎕ES
⎕EX	⎕FMT	⎕FX	⎕MF	⎕NAPPEND	⎕NC	⎕NCREATE	⎕NERASE	⎕NINFO	⎕NL
⎕NLOCK	⎕NREAD	⎕NRENAME	⎕NREPLACE	⎕NRESIZE	⎕NSIZE	⎕NTIE	⎕NUNTIE	⎕STOP	⎕TF
⎕TRACE	⎕UCS	⎕VR
Note that quad functions and variables (except for the ⎕A family of functions) are case insensitive

See Also
System Commands	System Variables and Functions	Operators

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