Copyright Digital Equipment Corp. All rights reserved.

Examples

   1.$ DAY_LIST = "MON/TUE/WED/THU/FRI/SAT/SUN"
     $ INQUIRE DAY "ENTER DAY (MON TUE WED THU FRI SAT SUN)"
     $ NUM = 0
     $ LOOP:
     $       LABEL = F$ELEMENT(NUM,"/",DAY_LIST)
     $       IF LABEL .EQS. "/" THEN GOTO END
     $       IF DAY .EQS. LABEL THEN GOTO 'LABEL'
     $       NUM = NUM +1
     $       GOTO LOOP
     $
     $ MON:
        .
        .
        .

     This example sets up a loop to test an input value against the
     elements in a list of values. If the value for DAY matches
     one of the elements in DAY_LIST, control is passed to the
     corresponding label. If the value returned by the F$ELEMENT
     function matches the delimiter, the value DAY was not present
     in the DAY_LIST, and control is passed to the label END.

   2.$ ! INDEX.COM
     $ !
     $ CHAPTERS = "0,1,2,3,4,5,6,A,B,C"
     $ NEXT = 0
     $ LOOP:
     $   NEXT = NEXT + 1
     $   NUM = F$ELEMENT(NEXT,",",CHAPTERS)
     $   IF (NUM .NES. ",")
     $   THEN
     $      RUN INDEX CHAP'NUM'
     $      GOTO LOOP
     $   ENDIF

     This example processes files named CHAP1, CHAP2, ... CHAP6,
     CHAPA, CHAPB, and CHAPC, in that order. (Zero is included in
     the CHAPTERS string to initialize the procedure logic.) NEXT
     is initialized to zero. The procedure enters the loop. In the
     first iteration, NEXT is incremented to 1 and the result of the
     F$ELEMENT call is the string "1". The procedure runs the index,
     chapter 1. In the second iteration, NEXT is incremented to 2
     and the result of the F$ELEMENT call is the string "1". The
     procedure runs the index, chapter 2. Processing continues until
     the result of the F$ELEMENT call is the delimiter specified in
     the call.