Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Keywords
Sample Program
BASIC always sets the final value for the loop variable before
setting the initial value. For example:
820 I=5
830 FOR I = 1 TO I + 5
840 PRINT I;
850 NEXT
executes the loop 10 times, which prints:
12345678910
Nested Loops
FORiNEXT loops may be nested; that is, a FOR/NEXT loop may
be placed within the context of another FOR/NEXT loop.
The NEXT statement for the inside loop must appear before the
NEXT for the outside loop.
If nested loops have the same end
point, a single NEXT statement may be used for all of them.
Sample Program
880 FOR I = 1 TO 3
890 PRINT "OUTER LOOP"
900 FOR J = 1 TO 2
91 0 PRINT " INNER LOOP"
920 NEXT J
930 NEXT I
This program performs 3 outer loops and 2 inner loops within
each of the outer loops. BASIC prints the following:
OUTER LOOP
INNER LOOP
INNER LOOP
INNER LOOP
INNER LOOP
INNER LOOP
INNER LOOP
OUTER LOOP
OUTER LOOP
165

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