Hello Monks..!!

Hope all doing good :)

I am trying to Get Excel column name for given decimal number.

my code able to obtion from A..ZZ. Once it reaches column AAA its not working. I have to update logic but I am running out of ideas.

Also I felt my code is very long. So any ideas to improve my code is appreciated.

Here is my code:

$colname = GetExcelColumnName(703);
print "colname is : $colname \n";

sub GetExcelColumnName
{
    $columnNumber = $_[0];
    $columnnamestr = "";
    print "column number is : $columnNumber \n";
    $columnNumber = $columnNumber;
    $div = $columnNumber/26;
    my $divstart = 0;
    if($columnNumber%26 == 0)
    { 
      $div = $div - 1;
      $divstart = 1;
    }
    $divcnt = 0;
    if($div >= 1)
    {
        $divcnt = $columnNumber/26;
    }   
    if(($divcnt == 0))
    {
        $columnname = 65-1+$columnNumber;
        $return_str = chr($columnname);

    }
    else
    {
        if($columnNumber == 26)
        {
            $columnname = 65+$div;
        }
        else{
            $columnname = 65-1+$div;
        }
        $return_str = chr($columnname);
        $mod = $columnNumber%26;
        if($columnname <= 90)
        {
            if(($return_str != 'Z') && ($mod == 0))
            {
                $columnname = 65;
            }
            elsif(($return_str == 'Z') && ($mod == 0))
            {
                $columnname = 90;  
            }
            else{
            $columnname = 65-1+$mod;
            }
            $return_str = $return_str.chr($columnname);
        }
        else
        {
            $return_str = "update logic \n";
        }
    }
    return $return_str;
}
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