The redo command restarts the loop block without evaluating the
conditional again. The continue block, if any, is not executed. If
the LABEL is omitted, the command refers to the innermost enclosing
loop. Programs that want to lie to themselves about what was just input
normally use this command:
redo cannot be used to retry a block that returns a value such as
eval {}
, sub {}
or do {}
, and should not be used to exit
a grep() or map() operation.
Note that a block by itself is semantically identical to a loop
that executes once. Thus redo inside such a block will effectively
turn it into a looping construct.
See also continue for an illustration of how last, next, and
redo work.