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    <body><span class="vcard"><a class="email" href="mailto:miguelangelrv@libreoffice.org" title="m.a.riosv <miguelangelrv@libreoffice.org>"> <span class="fn">m.a.riosv</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED NOTABUG - ISNUMBER is treating the value provided by LEFT as text instead of as a number."
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=117002">bug 117002</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>UNCONFIRMED
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">CC</td>
           <td>
                
           </td>
           <td>miguelangelrv@libreoffice.org
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>NOTABUG
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED NOTABUG - ISNUMBER is treating the value provided by LEFT as text instead of as a number."
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=117002#c3">Comment # 3</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED NOTABUG - ISNUMBER is treating the value provided by LEFT as text instead of as a number."
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=117002">bug 117002</a>
              from <span class="vcard"><a class="email" href="mailto:miguelangelrv@libreoffice.org" title="m.a.riosv <miguelangelrv@libreoffice.org>"> <span class="fn">m.a.riosv</span></a>
</span></b>
        <pre>(In reply to simm.emanem from <a href="show_bug.cgi?id=117002#c0">comment #0</a>)
<span class="quote">> .............
> I am pretty sure that the problem is with ISNUMBER, because if I add a
> number to the result of  LEFT, I get a correct sum:   =LEFT(G6)+1 equals 3.

> ISNUMBER is treating the value provided by LEFT as text instead of as a
> number.</span >
Because there is an automatic conversion out of LEFT() that gives an string,
the + operation makes the conversion.

An easy way to have it working is involve the LEFT() with N() function
N(LEFT()), or doing an operation forcing the conversion LEFT()+0.

<a href="https://help.libreoffice.org/6.0/en-US/text/scalc/01/04060104.html?System=WIN&DbPAR=CALC#bm_id3153786">https://help.libreoffice.org/6.0/en-US/text/scalc/01/04060104.html?System=WIN&DbPAR=CALC#bm_id3153786</a>

Returns the numeric value of the given parameter. Returns 0 if parameter is
text or FALSE.
If an error occurs the function returns the error value.
Syntax
N(Value)
Value is the parameter to be converted into a number. N() returns the numeric
value if it can. It returns the logical values TRUE and FALSE as 1 and 0
respectively. It returns text as 0.</pre>
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