Since execution
of
the program shown above will continue indefinitely, stop
it
by
pressing the I
SH
I
FT
I and I BREAK I keys together (this may be done at any
time to stop execution
of
a BASIC program).
To
resume execution, execute the
CONT J command.
Note The line
number
specified in a GOTO statement may
not
be
that
of a line included
within a
FOR
.
..
NEXT loop.
2. 3. 6. 3
GOSUB
~RETURN
..
.
..
.
.........
. .
..
....
. .
..
(abbreviated format: GOS.
~
RET.)
I Format I GOSUB Ln
Function
Example
RETURN
Ln . . . Destination line
number
The
GOSUB statement unconditionally transfers program execution to a BASIC
subroutine beginning at the line
number
specified in Ln; after execution
of
the
subroutine has been completed, execution
is
returned to
the
statement following
GOSUB when a RETURN statement
is
executed.
GOSUB ~ RETURN statements are frequently used when the same processing
is
required at several different points in a program. In such cases, a subroutine which
performs this processing
is
included at some point in the program, and execution
is
branched
to
this subroutine at appropriate points by means
of
the GOSUB state-
ment.
After
the required processing has been completed, execution is returned
to
the
main routine
by
the RETURN statement.
100
X
=1
0
1
10\GOS
UB
l
_.
1 2 0 P R I NT
130
E
ND
2
00
X= X
*2
21
0
RETURN
200~
X
------------------------------
--------
------
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