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 Programming task                     Keywords included in this list
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 Control program flow                 DO...LOOP, END, EXIT, FOR...NEXT,
                                      IF...THEN...ELSE, GOSUB...RETURN,
                                      GOTO, ON...GOSUB, ON...GOTO,
                                      SELECT CASE, STOP, SYSTEM

 Declare constants and variables      CONST, DATA, DIM, ERASE, OPTION BASE,
                                      READ, REDIM, REM, RESTORE, SWAP,
                                      TYPE...END TYPE

 Define and call Basic procedures     CALL, DECLARE, EXIT, FUNCTION, RUN,
                                      SHELL, SHARED, STATIC, SUB

 Device input/output                  CLS, CSRLIN, INKEY$, INP, INPUT,
                                      KEY (Assignment), LINE INPUT, LOCATE,
                                      LPOS, LPRINT, LPRINT USING, OPEN COM,
                                      OUT, POS, PRINT, PRINT USING, SPC,
                                      SCREEN Function, TAB, VIEW PRINT,
                                      WAIT, WIDTH

 Display graphic images               CIRCLE, COLOR, GET (Graphics), LINE,
                                      PAINT, PALETTE, PCOPY, PMAP, POINT,
                                      PRESET, PSET, PUT (Graphics),
                                      SCREEN Statement, VIEW, WINDOW

 DOS file system commands             CHDIR, KILL, MKDIR, NAME, RMDIR

 File input/output                    CLOSE, EOF, FILEATTR, FREEFILE
                                      GET (File I/O), INPUT, INPUT$,
                                      LINE INPUT, LOC, LOCK, LOF, OPEN,
                                      PUT (File I/O), SEEK Function,
                                      SEEK Statement, UNLOCK, WRITE

 Manage memory                        CLEAR, FRE, PEEK, POKE

 Manipulate strings                   ASC, CHR$, HEX$, INSTR, LCASE$, LEFT$,
                                      LEN, LSET, LTRIM$, MID$ Function, MID$
                                      Statement, OCT$, RIGHT$, RSET, RTRIM$
                                      SPACE$, STR$, STRING$, UCASE$, VAL

 Perform mathematical calculations    ABS, ASC, ATN, CDBL, CINT, CLNG, COS,
                                      CSNG, CVDMBF, CVSMBF, EXP, INT, LOG,
                                      RANDOMIZE, RND, SGN, SIN, SQR, TAN,
                                      TIME$ Function

 Set traps for events and errors      COM, ERDEV, ERDEV$, ERL, ERR, ERROR,
                                      KEY (Event Trapping), ON COM, ON ERROR,
                                      ON KEY, ON PEN, ON PLAY, ON STRIG,
                                      ON TIMER, PEN, PLAY (Event Trapping),
                                      RESUME, RETURN, STRIG, TIMER Function,
                                      TIMER Statement
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