Chapter
9
I
Introduction
to
BASIC
Keywords
Statement Description
SAVE
SCREEN
SHELL
SOUND
STOP
STRIG
STRIG/Trap
SWAP
SYSTEM
TIMER/Trap
TROFF
TRON
VIE WIGraphics
VIEW PRINT
WAIT
WHILE
...
WEND
WIDTH
WINDOW
WRITE
WRITE#
saves
a
program on disk.
sets the screen attributes (text, medium-
or
high-resolution)
to
be used by subse-
quent statements.
loads and executes another program as
a
child process.
generates a specific tone for
a
specified
length of time.
stops program execution.
enables the STRIG function.
controls joystick event trapping.
exchanges the values
of
variables.
returns
to
MS-DOS.
controls timer event trapping.
.
turns
off
the tracer.
turns on the tracer.
redefines the screen parameters.
creates a text viewport
to
redefine screen
parameters.
suspends program execution while moni-
toring the status of a machine input
port.
executes statements in a loop as long as
a
given condition is true.
sets the number of characters per line for
the screen
or
printer.
changes the physicial coordinates
of
the
screen.
prints data on the display.
writes data
to
a sequential file.
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