Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Ke.ywords
LOC Function
LOC(buffer)
Returns the current record position within a file.
Buffer is the number assigned to the file when you opened it.
You use
LOC to determine the current record position, that is,
the number
of the last record processed since you opened the file.
When used with direct access files,
LOC returns the record
number accessed by the last GET or PUT statement.
When used with sequential files,
LOC returns the number of
128-byte blocks that have been read or written.
Example
IF LOC(1)>55 THEN END
Program execution ends, if the current record position is greater
than
55.
Sample Program
1310 CIS = "WILLICIM WILSON"
1320 GET 1
1330 IF N$ = A$ THEN PRINT "FOUND IN RECORD"
LOCCI): CLOSE: END
1340 GOT0 1320
This is a portion of a direct access program. Elsewhere the file
has been opened and fielded.
N$ is a field variable. If N$
matches A$, the record number in which it was found is printed.
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Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200