Perl redo Statement


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The redo command restarts the loop block without evaluating the conditional again. You can provide a LABEL with redo statement where LABEL is the label for a loop. A redo statement can be used inside a nested loop where it will be applicable to the nearest loop if a LABEL is not specified.

If there is any continue block on the loop, then it will not be executed before evaluating the condition.

Syntax

The syntax for a redo statement is as follows −

redo [LABEL]

Flow Diagram

Perl redo statement

Example

The following program shows the usage of redo statement −

#/usr/local/bin/perl
   
$a = 0;
while($a < 10){
   if( $a == 5 ){
      $a = $a + 1;
      redo;
   }
   print "Value of a = $a\n";
}continue{
   $a = $a + 1;
}

This would produce the following result −

Value of a = 0
Value of a = 1
Value of a = 2
Value of a = 3
Value of a = 4
Value of a = 5
Value of a = 6
Value of a = 7
Value of a = 8
Value of a = 9

perl_loops.htm

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