Tandy 1000 Basic Reference Manual

Chapter 10 I BASIC Ke.ywords
IF X > 0 AND Y <> 0 THEN Y = X + 180
assigns the value X + 180 to Y if both exm-essions are true.
Otherwise, BASIC executes the next program- line, skipping the
THEN clause.
IF A$ = "YES" THEN 210 ELSE IF A$ = "NO" THEN
branches to Line 210 if A$ is YES. If not, BASIC skips to the
first ELSE, which introduces a new test.
If A$ is NO, then
BASIC branches
to Line 400. If A$ is any value besides NO or
YES, BASIC branches to Line 370.
400 ELSE 370
Sample Program
IFiTHENiELSE statements may be nested. However, you must
take care
to match up the IFs and ELSEs. (If the statement does
not contain the same number
of ELSEs and IFs, each ELSE is
matched with the closest unmatched IF.)
1040 INPUT "ENTER TWO NUMBERS"; A, B
1050 IF A <= B THEN IF A < B THEN PRINT A; ELSE
PRINT " NEITHER"; ELSE PRINT E;
1060 PRINT " IS SMALLER THAN THE OTHER"
This program prints the relationship between the 2 numbers
entered.
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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