iX Computer Systems - Edition 1 (32715-90001)

2-: 12

The LIST SUBS command prints the name and starting line number of every

subunit in the program, and indicates the currently executing program

unit with an asterisk (*). The LIST SUBS command is a command-only

statement. That is, it can only be issued at the interpreter prompt and

cannot be placed in a program.

Syntax

LIST SUBS

Example

The following example shows the use of the LIST SUBS command. When you

type LIST SUBS, the first line and subunit name are displayed for each

subunit in the program.

LIST

10 PRINT "this is the main"

20 CALL A

100 SUB A

110 PRINT " in sub a"

120 PRINT FNX

130 SUBEND

100000 DEF FNX

100100 PRINT " in fnx"

100200 RETURN 5

100300 FNEND

LIST SUBS

First Line Subunit name

---------- ------------

10 MAIN *

100 A

100000 FNX

MODIFY Command

The MODIFY command replaces, deletes, or inserts characters in one or

more program lines. The MODIFY command is a command-only statement.

That is, it can only be issued at the interpreter prompt, and cannot be

placed in a program.

Syntax

{MODIFY}

{MOD } [

line_range_list

]

The MODIFY command displays the lines of

line_range_list

one at a time.

If a program line occupies more than one physical line, each physical

line is displayed separately. When a line is displayed, the cursor is

positioned immediately under the beginning of that portion of the line

to be modified. Choose one of the editing commands in Table 2-4 or type

thecharacters to be replaced.