Flow-control structures: Difference between revisions
Content added Content deleted
No edit summary |
|||
Line 545: | Line 545: | ||
executable expressions, to be run when current processing is done, even if |
executable expressions, to be run when current processing is done, even if |
||
a 'throw' or 'bye' was executed, or an error occurred. |
a 'throw' or 'bye' was executed, or an error occurred. |
||
=={{header|PL/I}}== |
|||
<lang PL/I> |
|||
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 (This form is superseded by SELECT, above.) |
|||
</lang> |
|||
=={{header|Pop11}}== |
=={{header|Pop11}}== |