Basic computer language commands

Basic computer programming language

TRON/TROFF Commands

Purpose:

To trace the execution of program statements.

Syntax:

TRON
TROFF

Comments:

As an aid in debugging, the TRON (trace on) command enables a trace flag that prints each line number of the program as it is executed. The numbers appear enclosed in square brackets.

TRON may be executed in either the direct or indirect mode.

The trace flag is disabled with the TROFF (trace off) command, or when a NEW command is executed.

Examples:

TRON
10 K=10
20 FOR J=1 TO 2
30 L=K + 10
40 PRINT J; K; L
50 K=K+10
60 NEXT
70 END
RUN
 [10][20][30][40] 1 10 20
 [50][60][30][40] 2 20 30
 [50][60][70]
TROFF

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