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         I N T E R P R E T E D    B A S I C    R E V I S I T E D     5. 
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    An interesting characteristic  of            EX1.BAS USING INPUT A$  
    BASIC is the variety of its input          =======================        
    functions.  Type these in a BASIC         10  CLS  
    environment  and   when  you  RUN         20  INPUT "TYPE A LETTER ", A$  
    them , ponder  their  differences,        30  CLS: BEEP   
    their  subtleties  and  their pos-        40  PRINT A$  
    sibilties.  
  
      
    EX2.BAS USING A$=INPUT$(1)                EX3.BAS USING A$=INKEY$  
    ==========================                ========================  
    10  CLS                                    10  CLS  
    20  PRINT "TYPE A LETTER -"                20  PRINT "TYPE A LETTER "  
    30  A$=INPUT$(1)                           30  A$=INKEY$  
    40  CLS: BEEP                              40  IF A$="" THEN 10  
    50  PRINT A$                               50  CLS: BEEP  
                                               60  PRINT A$  
