Return values

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Perl functions always returns a value. Either explicitly by calling return or the result of the last computation.

examples/subroutines/return_value.pl

#!/usr/bin/perl

sub loop {
    $i = 0;
    while ($i < 10) {
       $i++;
    }
}
print loop();            # what is this value ?
print $i;                # 10

Solving the above problem: always use return Add return $i; before the end of the subroutine.