Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Keywords
Statement
SWAP varia blel paria ble2
Exchanges the values of 2 variables.
You may swap variables
of any type (integer, single precision,
double precision, or string). However, both must be
of the same
type; otherwise, a "Type mismatch" error results.
Either or both variables may be elements
of arrays. If one or
both
of the variables are non-array variables that have not been
assigned values, an "Illegal function call" error results.
Example
SWAP F1#, F2#
swaps the values of F1# and F2#. The contents of F2# are put
into F1#, and the contents
of F1# are put into F2#.
Sample Program
10 A$="ONE ":B$="ALL ":C$="FOR "
20 PRINT A$ C$ E$
30 SWAP AS,
E$
40 PRINT A$ C$ E$
When run, the program displays:
ONE FOR
ALL
ALL FOR ONE
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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