Compaq BASIC for OpenVMS
Alpha and VAX Systems
Reference Manual

Contents

Preface
Preface	Preface
Chapter 1
1	Program Elements and Structure
1.1	Components of Program Lines
1.1.1	Line Numbers
1.1.1.1	Programs with Line Numbers
1.1.1.2	Programs Without Line Numbers
1.1.2	Labels
1.1.3	Statements
1.1.3.1	Keywords
1.1.3.2	Single-Statement Lines and Continued Statements
1.1.3.3	Multistatement Lines
1.1.4	Compiler Directives
1.2	BASIC Character Set
1.3	BASIC Data Types
1.3.1	Implicit Data Typing
1.3.2	Explicit Data Typing
1.3.3	QUAD and IEEE Floating-Point Data Types
1.4	Variables
1.4.1	Variable Names
1.4.2	Implicitly Declared Variables
1.4.3	Explicitly Declared Variables
1.4.4	Subscripted Variables and Arrays
1.4.5	Initialization of Variables
1.5	Constants
1.5.1	Numeric Constants
1.5.1.1	Floating-Point Constants
1.5.1.2	Integer Constants
1.5.1.3	Packed Decimal Constants
1.5.2	String Constants
1.5.3	Named Constants
1.5.3.1	Naming Constants Within a Program Unit
1.5.3.2	Naming Constants External to a Program Unit
1.5.4	Explicit Literal Notation
1.5.5	Predefined Constants
1.6	Expressions
1.6.1	Numeric Expressions
1.6.1.1	Floating-Point and Integer Promotion Rules
1.6.1.2	DECIMAL Promotion Rules
1.6.2	String Expressions
1.6.3	Conditional Expressions
1.6.3.1	Numeric Relational Expressions
1.6.3.2	String Relational Expressions
1.6.3.3	Logical Expressions
1.6.4	Evaluating Expressions
1.7	Program Documentation
1.7.1	Comment Fields
1.7.2	REM Statements
Chapter 2
2	VAX BASIC Environment Commands
Command 1	! Your-comment
Command 2	$ System-command
Command 3	APPEND
Command 4	ASSIGN
Command 5	COMPILE
Command 6	CONTINUE
Command 7	DELETE
Command 8	EDIT
Command 9	EXIT
Command 10	HELP
Command 11	IDENTIFY
Command 12	INQUIRE
Command 13	LIST and LISTNH
Command 14	LOAD
Command 15	LOCK
Command 16	NEW
Command 17	OLD
Command 18	RENAME
Command 19	REPLACE
Command 20	RESEQUENCE
Command 21	RUN and RUNNH
Command 22	SAVE
Command 23	SCALE
Command 24	SCRATCH
Command 25	SEQUENCE
Command 26	SET
Command 27	SHOW
Command 28	UNSAVE
Chapter 3
3	Compiler Directives
Command 29	%ABORT
Command 30	%CROSS
Command 31	%DECLARED
Command 32	%DEFINE
Command 33	%IDENT
Command 34	%IF-%THEN-%ELSE-%END %IF
Command 35	%INCLUDE
Command 36	%LET
Command 37	%LIST
Command 38	%NOCROSS
Command 39	%NOLIST
Command 40	%PAGE
Command 41	%PRINT
Command 42	%REPORT
Command 43	%SBTTL
Command 44	%TITLE
Command 45	%UNDEFINE
Command 46	%VARIANT
Chapter 4
4	Statements and Functions
Command 47	ABS
Command 48	ABS%
Command 49	ASCII
Command 50	ATN
Command 51	BUFSIZ
Command 52	CALL
Command 53	CAUSE ERROR
Command 54	CCPOS
Command 55	CHAIN
Command 56	CHANGE
Command 57	CHR$
Command 58	CLOSE
Command 59	COMMON
Command 60	COMP%
Command 61	CONTINUE
Command 62	COS
Command 63	CTRLC
Command 64	CVT$$
Command 65	CVTxx
Command 66	DATA
Command 67	DATE$
Command 68	DATE4$
Command 69	DECIMAL
Command 70	DECLARE
Command 71	DEF
Command 72	DEF*
Command 73	DELETE
Command 74	DET
Command 75	DIF$
Command 76	DIMENSION
Command 77	ECHO
Command 78	EDIT$
Command 79	END
Command 80	ERL
Command 81	ERN$
Command 82	ERR
Command 83	ERT$
Command 84	EXIT
Command 85	EXP
Command 86	EXTERNAL
Command 87	FIELD
Command 88	FIND
Command 89	FIX
Command 90	FNEND
Command 91	FNEXIT
Command 92	FOR
Command 93	FORMAT$
Command 94	FREE
Command 95	FSP$
Command 96	FUNCTION
Command 97	FUNCTIONEND
Command 98	FUNCTIONEXIT
Command 99	GET
Command 100	GETRFA
Command 101	GOSUB
Command 102	GOTO
Command 103	HANDLER
Command 104	IF
Command 105	INKEY$
Command 106	INPUT
Command 107	INPUT LINE
Command 108	INSTR
Command 109	INT
Command 110	INTEGER
Command 111	ITERATE
Command 112	KILL
Command 113	LBOUND
Command 114	LEFT$
Command 115	LEN
Command 116	LET
Command 117	LINPUT
Command 118	LOC
Command 119	LOG
Command 120	LOG10
Command 121	LSET
Command 122	MAG
Command 123	MAGTAPE
Command 124	MAP
Command 125	MAP DYNAMIC
Command 126	MAR
Command 127	MARGIN
Command 128	MAT
Command 129	MAT INPUT
Command 130	MAT LINPUT
Command 131	MAT PRINT
Command 132	MAT READ
Command 133	MAX
Command 134	MID$
Command 135	MIN
Command 136	MOD
Command 137	MOVE
Command 138	NAME...AS
Command 139	NEXT
Command 140	NOECHO
Command 141	NOMARGIN
Command 142	NUM
Command 143	NUM2
Command 144	NUM$
Command 145	NUM1$
Command 146	ON ERROR GO BACK
Command 147	ON ERROR GOTO
Command 148	ON ERROR GOTO 0
Command 149	ON...GOSUB
Command 150	ON...GOTO
Command 151	OPEN
Command 152	OPTION
Command 153	PLACE$
Command 154	POS
Command 155	PRINT
Command 156	PRINT USING
Command 157	PROD$
Command 158	PROGRAM
Command 159	PUT
Command 160	QUO$
Command 161	RAD$
Command 162	RANDOMIZE
Command 163	RCTRLC
Command 164	RCTRLO
Command 165	READ
Command 166	REAL
Command 167	RECORD
Command 168	RECOUNT
Command 169	REM
Command 170	REMAP
Command 171	RESET
Command 172	RESTORE
Command 173	RESUME
Command 174	RETRY
Command 175	RETURN
Command 176	RIGHT$
Command 177	RMSSTATUS
Command 178	RND
Command 179	RSET
Command 180	SCRATCH
Command 181	SEG$
Command 182	SELECT
Command 183	SET PROMPT
Command 184	SGN
Command 185	SIN
Command 186	SLEEP
Command 187	SPACE$
Command 188	SQR
Command 189	STATUS
Command 190	STOP
Command 191	STR$
Command 192	STRING$
Command 193	SUB
Command 194	SUBEND
Command 195	SUBEXIT
Command 196	SUM$
Command 197	SWAP%
Command 198	TAB
Command 199	TAN
Command 200	TIME
Command 201	TIME$
Command 202	TRM$
Command 203	UBOUND
Command 204	UNLESS
Command 205	UNLOCK
Command 206	UNTIL
Command 207	UPDATE
Command 208	VAL
Command 209	VAL%
Command 210	VMSSTATUS
Command 211	WAIT
Command 212	WHEN ERROR
Command 213	WHILE
Command 214	XLATE$