Line - Revision history

Laura at 23:55, 21 May 2014

2014-05-21T23:55:29Z

← Older revision		Revision as of 23:55, 21 May 2014
Line 1:		Line 1:
	~~Line~~		LINE

	The '''Line''' [[internal function]] returns the line number of the most recent [[error]]. When an error occurs in a procedure while PROCERR RETURN is in effect, LINE is set to -1.		The '''Line''' [[internal function]] returns the line number of the most recent [[error]]. When an error occurs in a procedure while PROCERR RETURN is in effect, LINE is set to -1.

John: moved LINE to Line over redirect

2014-02-27T13:13:15Z

moved LINE to Line over redirect

← Older revision	Revision as of 13:13, 27 February 2014
(No difference)

Mikhail.zheleznov: *

2012-01-26T19:50:49Z

← Older revision		Revision as of 19:50, 26 January 2012
Line 20:		Line 20:
	====Related Functions====		====Related Functions====

	ERR		[[ERR]]

	====Technical Considerations====		====Technical Considerations====

Mikhail.zheleznov: *

2012-01-26T19:50:28Z

← Older revision		Revision as of 19:50, 26 January 2012
Line 4:		Line 4:

	====Comments and Examples====		====Comments and Examples====

	Program errors which are not anticipated can be handled by adding the following to any program.		Program errors which are not anticipated can be handled by adding the following to any program.

	00001 ON ERROR GOTO 99900		00001 ON ERROR GOTO 99900
	o		o
	o		o
Line 17:		Line 18:
	99960 CHAIN "MENU"		99960 CHAIN "MENU"

	====Related Functions:====		====Related Functions====

	ERR		ERR

	====Technical Considerations====		====Technical Considerations====
	:1.) There are four cases where errors occur and LINE is not set. First, LINE is not changed when an ON error statement (or default) has set to IGNORE the error condition corresponding to this error. Second, when the error code is 4273 (topic not found in help file), the system does not set LINE or ERR so that an error in attempting to use the HELP$ function in an error trapping routine will not affect the ability to use RETRY or CONTINUE. Third, the value of LINE is not affected when an error occurs in an immediate statement which has been keyed in from the keyboard; the error code for this immediate statement is displayed correctly in the status line. Fourth, the value of LINE is not affected when an undefined function causes error code 0302; instead, the name of the undefined function is displayed on the 23rd line of the screen.
	~~:2.) LINE is initialized to -1 by the following: the RUN command, PROCERR RETURN command, CLEAR or CLEAR ALL commands and any other commands which clear memory.~~
	:3.) When PROCERR RETURN is in effect, and a syntax error occurs during a LOAD SOURCE command, LINE is set to the line number of the previous line (instead of the current, unaccepted line), and control is returned to the procedure.


			# There are four cases where errors occur and LINE is not set. First, LINE is not changed when an ON error statement (or default) has set to IGNORE the error condition corresponding to this error. Second, when the error code is 4273 (topic not found in help file), the system does not set LINE or ERR so that an error in attempting to use the HELP$ function in an error trapping routine will not affect the ability to use RETRY or CONTINUE. Third, the value of LINE is not affected when an error occurs in an immediate statement which has been keyed in from the keyboard; the error code for this immediate statement is displayed correctly in the status line. Fourth, the value of LINE is not affected when an undefined function causes error code 0302; instead, the name of the undefined function is displayed on the 23rd line of the screen.
			# LINE is initialized to -1 by the following: the RUN command, PROCERR RETURN command, CLEAR or CLEAR ALL commands and any other commands which clear memory.
			# When PROCERR RETURN is in effect, and a syntax error occurs during a LOAD SOURCE command, LINE is set to the line number of the previous line (instead of the current, unaccepted line), and control is returned to the procedure.

	<noinclude>		<noinclude>
	[[Category:Internal Functions]]		[[Category:Internal Functions]]
	</noinclude>		</noinclude>

Mikhail.zheleznov: moved Line to LINE

2012-01-17T09:07:59Z

moved Line to LINE

← Older revision	Revision as of 09:07, 17 January 2012
(No difference)

Mikhail.zheleznov: 1 revision

2012-01-15T14:11:52Z

1 revision

New page

Line

The '''Line''' [[internal function]] returns the line number of the most recent [[error]]. When an error occurs in a procedure while PROCERR RETURN is in effect, LINE is set to -1.

====Comments and Examples====
Program errors which are not anticipated can be handled by adding the following to any program.

00001 ON ERROR GOTO 99900
o
o
99900 PRINT "Unexpected Error Number";ERR
99910 PRINT "occurred at line number";LINE
99920 PRINT
99930 PRINT "Please record this information,"
99940 PRINT "and call your dealer at once!"
99950 PAUSE
99960 CHAIN "MENU"

====Related Functions:====
ERR

====Technical Considerations====
:1.) There are four cases where errors occur and LINE is not set. First, LINE is not changed when an ON error statement (or default) has set to IGNORE the error condition corresponding to this error. Second, when the error code is 4273 (topic not found in help file), the system does not set LINE or ERR so that an error in attempting to use the HELP$ function in an error trapping routine will not affect the ability to use RETRY or CONTINUE. Third, the value of LINE is not affected when an error occurs in an immediate statement which has been keyed in from the keyboard; the error code for this immediate statement is displayed correctly in the status line. Fourth, the value of LINE is not affected when an undefined function causes error code 0302; instead, the name of the undefined function is displayed on the 23rd line of the screen.
:2.) LINE is initialized to -1 by the following: the RUN command, PROCERR RETURN command, CLEAR or CLEAR ALL commands and any other commands which clear memory.
:3.) When PROCERR RETURN is in effect, and a syntax error occurs during a LOAD SOURCE command, LINE is set to the line number of the previous line (instead of the current, unaccepted line), and control is returned to the procedure.

<noinclude>
[[Category:Internal Functions]]
</noinclude>