Minimal BASIC


Statements:
DATA {<quoted string> | <unquoted string>}+,
DEF <function> [( <argument> )] = <expression>
DIM {<numeric variable> ( <integer> [, <integer>] )}+,
END
FOR <numeric variable> = <expression> TO <expression> [STEP <expression>]
GOSUB <integer>
GOTO <integer>
IF <expression> <relation> <expression> THEN <integer>
INPUT {<variable>}+,
LET <variable> = <expression>
NEXT <numeric variable>
ON <expression> GOTO {<integer>}+,
OPTION BASE {0 | 1}
PRINT {<expression> | TAB ( <expression> )}*,;
RANDOMIZE
READ {<variable>}+,
REM <arbitrary text>
RESTORE
RETURN
STOP


Functions:
ABS(), ATN(), COS(), EXP(), INT(), LOG(), RND, SGN(), SIN(), SQR(), TAN()
+, -, *, /, ^


numeric variables: A, A0, ..., A9, B, ..., Z9
array names: A, ..., Z
string names: A$, ..., Z$
function names: FNA, ..., FNZ


statement numbers: 1, ..., 9999


Top-level commands:
LIST
RUN
NEW
LOAD "file"
SAVE "file"
RENUM
CONTINUE
QUIT