Commodore VIC-20 - Page 22

EXAMPLE:
10 PI = 0: C --■ 1
20 PI =
30 PRINT PI
40 C - C + 4:GOTO 20
0: C = 1
PI + 4/C - 4/(C + 2)
■ Dl
This program calculates the value of PI. RUN this program, and
after a short while hit the ^9 key. You will see the display:
BREAK IN 20
Type the command PRINT C to see how far the VIC has gotten.
Then use CONT to resume from where the VIC left off.
LIST
Format: * Abbreviation: Screen Display:
LIST [from line number] LKi;!!rTiJ I L -,
- [to line number]
The LIST command allows you to look at lines of the BASIC
program currently in the VIC's memory. The VfC's powerful screen
editor allows you to easily and quickly edit programs which you
have LISTed.
The LIST command can specify which program line numbers will
be shown. If you type LIST and a single line number, only that line
will be displayed. If the number is followed by a hyphen (-), all the
lines from that number forward will be shown. If the number is
preceded by the hyphen, all lines from the beginning to that line will
be shown. You can LIST a range of line numbers by typing the two
line numbers separated by a hyphen, in which case the lines from
the first number to the second number are shown. If LIST0 is typed,
the
whole program will be LISTed and not just line 0.
If the program length exceeds the length of the screen display,
the first lines in the program will scroll off the screen during LISTing.
To slow down the scrolling, hold down the p^ hi if I key. To stop
the program during a LIST, hit the EQ3 key.
The LIST command may also be used as a statement within a
BASIC program, but the program will stop as soon as the LIST is
finished.
"All format entries should be typed in one line