my $vlen = 1;
$LimitValue = sprintf("%-${vlen}.${vlen}s", $LimitValue);

##</code><code>##

$LimitValue = sprintf("%-*s", $vlen, $LimitValue);

##</code><code>##

$formatter = sprintf( "%%-%d.%ds", $vlen, $vlen );
$LimitValue = sprintf($formatter, $LimitValue);