System Function EM: Difference between revisions

From NARS2000
Jump to navigationJump to search
(new)
 
(add 3rd item explaining usage)
Line 3: Line 3:
<apll>{quad}EM</apll> is an [[ISO 13751]] standard niladic system function which returns the current error message. This is typically an array of three strings. The first element is the text of the error message itself, in all upper case. The second element is the line typed in or the line of the function where the error occurred. The third element is usually a caret (^) pointing to where the error in the line shown in the second element occurred.
<apll>{quad}EM</apll> is an [[ISO 13751]] standard niladic system function which returns the current error message. This is typically an array of three strings. The first element is the text of the error message itself, in all upper case. The second element is the line typed in or the line of the function where the error occurred. The third element is usually a caret (^) pointing to where the error in the line shown in the second element occurred.


The format of <apll>{quad}EM</apll> is implementation dependent.  
The format of <apll>{quad}EM</apll> is implementation dependent.
 
<apll>{quad}EM</apll> is a ''niladic'' function, you cannot assign a value to it.


{{System Variables}}
{{System Variables}}

Revision as of 04:49, 22 February 2013

⎕EM - Error Message

⎕EM is an ISO 13751 standard niladic system function which returns the current error message. This is typically an array of three strings. The first element is the text of the error message itself, in all upper case. The second element is the line typed in or the line of the function where the error occurred. The third element is usually a caret (^) pointing to where the error in the line shown in the second element occurred.

The format of ⎕EM is implementation dependent.

⎕EM is a niladic 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