Assuming the method row_range() returns two or more values and you are only interested in the second one, you could use a slice:

my $row_min = 1;
my $row_max = ( $worksheet->row_range() )[1];
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But maybe it makes more sense to read the module's documentation. Maybe there is a dedicated method to return the value for row_max.

edit:

Or simply overwrite $row_min after the call of row_range().

my ( $row_min, $row_max ) = $worksheet->row_range();
$row_min = 1;
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