redo
- redo EXPR
- redo
The
redo
command restarts the loop block without evaluating the conditional again. Thecontinue
block, if any, is not executed. If the LABEL is omitted, the command refers to the innermost enclosing loop. Theredo EXPR
form, available starting in Perl 5.18.0, allows a label name to be computed at run time, and is otherwise identical toredo LABEL
. 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 aseval {}
,sub {}
, ordo {}
, 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
, andredo
work.Unlike most named operators, this has the same precedence as assignment. It is also exempt from the looks-like-a-function rule, so
redo ("foo")."bar"
will cause "bar" to be part of the argument toredo
.