Programming Manual for Citizen BASIC Interpreter - MaRCo

Citizen BASIC Interpreter
numerals and underscores are available for use. Reserved words are not usable as
an identifier. The variable distinguishes capital letters from small letters.
2.1.3 Reserved Word
The following reserved words are not definable or applicable as an identifier:
REPEAT INPUT END RUN GOTO
REMLIST LET PRINT STOP DELETE
EDITINPUT CLEAR SAVE LOAD NEW
RESUME IF RANDOMIZE DIM FOR
NEXT GOSUB RETURN ON ERROR
AUTO READ DATA RESTORE BASE
OPEN CLOSE MERGE QUIT BYE
EXIT DEF CONT POKE LINPUT
REPEAT UNTIL WHILE WEND SEEK
RENUM RECOVER DUMP SYSTEM WIDTH
AUTONUM DIR FILES STORE ECHO
OFF DECLARE BREAK RESTART DEBUG
STEP TRACE DO LOOP ELSE
ENDIF SLEEP CLRERR SETERR INBYTE
OUTBYTE JQ ZBICOMPATI ZPL MID
RIGHT LEFT STRING ERMSG CHR
STR SPACE GET MKI MKF
DATE SEARCHTO EXTRACT LCASE UCASE
LTRIM RTRIM TIME HEX OCT
INKEY SGN LEN ABS VAL
ASC INSTR EOF POSN SQR
LOG EXP EVAL INT PEEK
SIN COS ATAN MKI MKF
RND PI ERL ERR DATE
ISERROR ISWARNING DATAREADY MAX MIN
MAXLEN MAXNUM MOD ORD POS
TIME THEN TAB TO AS
OUTPUT APPEND TERMINAL USING NUMERIC
STRING NAME ACCESS INOUT
2.1.4 Numeral
An integer constant and real constant are described as the numeral of decimal
notation which consists of a series of numerals with no commas or space included,
and are led by the operator of + or – representing a sign. A value turns positive
by default, and thus 67258 is equivalent to +67258, for instance. Further, a constant
value must be included in the range of the defined real type maximum value and integer
type maximum value.
Numbers with the decimal point or exponential part represent real numbers, and the
others refer to integer numbers. The real number with E or e is interpreted as “…th
power of ~ multiplied by 10”. For instance, 7E-2 is interpreted as 7×10^-2, and
both 12.25e+6 and 12.25e6 as 12.25×10^6.
However, the variables of the BASIC interpreter support integer numbers only;
therefore real numbers cannot be substituted.
The prefix of an ampersand such as &H8F represents hexadecimal. A hexadecimal value
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