Subroutine Perl

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  4. Define subroutine and call it with using global variable
sub printifOK
{
    if ($value > 10 ) {
        print "Value is $value.\n";
    } else {
        print "Value is too small.\n";
    }
}
$value = 10;
printifOK;
$value = 12;
printifOK;