Atari 400 User Manual

48 User's Handbook to the Atari 400/ 800 Compute rs
meaning.
100 LET A = 5
200 A = 5
BASIC Variable Names
Atari Basic allows any group of up to 114 characte rs to be used as
a variable name--as l ong as the first ch aracter of the group is a
capital l etter of the alph abet, and as l ong as the variable name
does not duplicate a reserved word (see Appendix B). Examples
of reserved words are :
LET , GOTO , IF , READ, DATA
The following are examples of va lid BASIC var iable names,
A
B23456
TOTAL.DATA
A2
JOHN
N4N
B%
N
while the following are invalid variable name s:
2BB7
lA
PRINT
END
FOR
COS
All of the preceding examp l es of valid vari able names should be
used to represent num e ric data. Variable names can a ls o be used
to repr esent str in g data. These are known as string variables.
String variable names con sist of a va lid vari able name followed
by the dollar sign ($). The following are examp l es of val id string
variable names.
A$
B1P$
A7$

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)