Of course. The obvious way:

my $vlen = 1;
$LimitValue = sprintf("%-${vlen}.${vlen}s", $LimitValue);
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The "real" sprintf to do variable field sizes is:

$LimitValue = sprintf("%-*s", $vlen, $LimitValue);
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You can also do:

$formatter = sprintf( "%%-%d.%ds", $vlen, $vlen );
$LimitValue = sprintf($formatter, $LimitValue);
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if you wanted to reuse the formatter elsewhere.

c.