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Task/Flow-control-structures/PL-I/flow-control-structures.pli

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+LEAVE
+   The LEAVE statement terminates execution of a loop.
+   Execution resumes at the next statement after the loop.
+ITERATE
+   The ITERATE statement causes the next iteration of the loop to
+   commence.  Any statements between ITERATE and the end of the loop
+   are not executed.
+STOP
+   Terminates execution of either a task or the entire program.
+SIGNAL FINISH
+   Terminates execution of a program in a nice way.
+SIGNAL statement
+   SIGNAL <condition> raises the named condition.  The condition may
+   be one of the hardware or software conditions such as OVERFLOW,
+   UNDERFLOW, ZERODIVIDE, SUBSCRIPTRANGE, STRINGRANGE, etc, or a
+   user-defined condition.
+CALL
+   The CALL statement causes control to transfer to the named
+   subroutine.
+SELECT
+   The SELECT statement permits the execution of just one of a
+   list of statements (or groups of statements).
+   It is sort of like a computed GOTO.
+GO TO
+   The GO TO statement causes control to be transferred to the named
+   statement.
+   It can also be used to transfer control to any one of an array of
+   labelled statements. (This form is superseded by SELECT, above.)
+   [GO TO  can also be spelled as  GOTO].