Tandy 1000 Basic Reference Manual

Chapter 51 Basic Concepts
BASIC evaluates 5 to the 2.8 power first, then multiplies X*X,
and finally adds the 2 values.
You can change the order of the hierarchy by adding parentheses
to an expression. BASIC always evaluates the expressions inside
the parentheses before evaluating the rest of the expression.
Look at this expression:
X * (X + 5Y2.8
BASIC evaluates the expression (X +
5) first and raises that
value to the
2.8 power before performing the multiplication.
If an expression contains multiple parentheses, BASIC evaluates
the innermost parentheses first.
Functions
A function is a built-in sequence of operations that BASIC per-
forms on data. BASIC always performs functions first when eval-
uating a statement.
Numeric functions, such as ABS,
SQR, and COS, perform prede-
fined operations on numeric data.
String functions, such
as MID$, VAL$, and LEN$, perform oper-
ations on string data.
Functions are described in Chapter
10.
56

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