Sharp OZ-707 Operation Manual - Page 62

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CLEAR p o FORMAT: CLEAR [variable 1, variable 2, ..., variable n] Abbreviation: Cl. See Also: DIM, ERASE PURPOSE: Erases variables that have been used in the program and resets all preallocated variables to zero or null. REMARKS: CLEAR recovers memory space used to store simple numeric variables, and array variables secured using the DIM statement. Also use CLEAR at the beginning of a program to clear space occupied by variables from previously run programs if several programs are in memory. Do not use the CLEAR command within a FOR. ..NEXT loop. Use the ERASE command to clear specific array variables. EXAMPLE: 10: A = 5: DIM C(5) 20: CLEAR [20] Frees up the spaces assigned to C( ) and resets A to zero. CLOSE p o FORMAT: CLOSE [# file number, # file number, ...] Abbreviation: CLOS. See Also: OPEN PURPOSE: Closes a file or files on the currently accessed device. REMARKS: This command closes files with the specified file numbers. If fl{) file number is specified, all files are closed. The file numbers are then released for use with other files. All files are closed in the following cases: • An END or RUN command is executed. • The power is turned off. • The Card is changed to the STAT or AER mode. • A program is written or read (by the LOAD or MERGE command). EXAMPLE: CLOSE #2, #5 , #21 Closes files #2, #5, and #21 . 112 113

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CLEAR
FORMAT:
CLEAR [variable
1,
variable
2,
..., variable
n]
Abbreviation:
Cl.
See
Also:
DIM, ERASE
PURPOSE:
Erases variables that have been used
in
the program and resets
all
preallocated variables to zero
or
null.
REMARKS:
CLEAR recovers memory space used to store simple numeric
variables,
and
array variables secured using the
DIM
statement. Also
use CLEAR at the beginning of a program
to
clear space occupied by
variables from previously
run
programs if several programs are
in
memory.
Do not use the CLEAR command within a FOR.
..
NEXT loop.
Use the ERASE command to clear specific array variables.
EXAMPLE:
10
: A
=
5:
DIM
C(5)
20: CLEAR
[20] Frees up the spaces assigned
to
C(
) and resets A to zero.
112
p
o
CLOSE
F
ORMAT:
CLOSE
[#
file number,
#
file number, .
..
]
Abbreviation:
CLOS.
See
Also:
OPEN
P
URPOSE:
Closes a file or files
on
the currently accessed device.
REMARKS:
This command closes files with the specified file numbers. If
fl{)
file
number
is
specified,
all
files are closed. The file numbers are then
released for use with other files.
All files are closed
in
the following cases:
•
An
END or
RUN
command
is
executed.
• The power
is
turned off.
• The Card
is
changed
to
the STAT or AER mode.
• A program
is
written or read (by the LOAD or MERGE command).
EXAMPLE:
CLOSE #2, #5 ,
#21
Closes files #2, #5,
and
#21
.
113
p
o