Topic       : The GFA-Basic Compendium
Author      : GFA Systemtechnik GmbH
Version     : GFABasic.HYP v2.98 (12/31/2023)
Subject     : Documentation/Programming
Nodes       : 899
Index Size  : 28056
HCP-Version : 3
Compiled on : Atari
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@hostname   : STRNGSRV
@hostname   : CAB     
@hostname   : HIGHWIRE
@hostname   : THING   
View Ref-FileTRON
TRON #n
TROFF

n: iexp

The command TRON (TRace ON) causes each command to be listed on the screen as
they are executed. This list can be diverted to a printer or the serial
interface by specifying the relevant channel number. The command TROFF turns
the TRace OFF again.

Example:

    PRINT "Start:"
    TRON
    FOR i%=1 TO 5
      PRINT i%
    NEXT i%
    TROFF
    PRINT "End"

--> The word 'Start:' appears on the screen, then the numbers from 1 to 5 are
    displayed, along with the commands which lead to their display. After that
    the word 'End' is displayed.

    OPEN "o",#1,"\tron.lst"
    TRON #1
    FOR i%=1 TO 10
      PRINT i%
    NEXT i%
    TROFF
    CLOSE #1
    '
    OPEN "O",#2,"prn:"
    TRON #2
    FOR i%=10 TO 630 STEP 10
      LINE i%,0,i%,100
    NEXT i%
    TROFF
    CLOSE #2

--> The numbers from 1 to 10 are displayed, along with the relevant commands
    and a row of vertical lines at a distance of 10 pixels. This output is
    directed to disk or printer.

Memo: See section 'The Modifier Keys'.
      TRON is not usable in compiled applications.