问如何在html表中添加单元格并检查是否重复，而不输入以下循环？

EN

$("#btnCheck").on("click", function() {
  let company_name = $("#test1").val();

  $('#companyTable tr').each(function() {
    $(this).find('td').each(function() {
      if ($(this).text() === company_name) {
        alert("duplicate  found");
        return false;
      } else {
        alert("duplicate NOT found");
        return false;
      }
    });
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table id="companyTable">
  <thead>
    <tr>
      <td>Company Name</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>toyota</td>
    </tr>
    <tr>
      <td>bmw</td>
    </tr>
    <tr>
      <td>suzuki</td>
    </tr>
  </tbody>
</table>

<input type="text" id="test1" />
<input type="button" id="btnCheck" value="ADD" />