Loop control
You can put a label on a loop to give it a name. The
loop’s label identifies the loop for the loop-control commands
next
, last
, and redo
:
LINE: while (<SCRIPT>) { print; next LINE if /^#/; # Discard comments }
The syntax for the loop-control commands is:
lastlabel
nextlabel
redolabel
If the label is omitted, the loop-control command refers to the innermost enclosing loop.
The last
command
is like the break
statement in
C (as used in loops); it immediately exits the loop in question.
The continue
block, if any, is
not executed.
The next
command
is like the continue
statement
in C; it skips the rest of the current iteration and starts the
next iteration of the loop. If there is a continue
block on the loop, it is always
executed just before the conditional is reevaluated.
The redo
command
restarts the loop block without evaluating the conditional again.
The continue
block, if any, is
not executed.
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