How to fetch the value from excel .

Better approach is to go Row wise instead having column wise, As below

If Row wise approach you can use below,

function rowWise()
{
      var excelDriver = DDT.ExcelDriver("<excel file name>");
      var cno_Col1 = getColumnNo(excelDriver,str_ColName);
      
      excelDriver.First();
      
      while(!excelDriver.EOF())
      {
            if(DDT.CurrentDriver.Value(cno_Col1) != "")
            {
                  Log.Message(DDT.CurrentDriver.Value(cno_Col1));     
            }
            else
            {
                  break;
            }
      }
}
function getColumnNo(obj_Driver,str_ColName)
{
      
      for(var i = 0 ; i < obj_Driver.ColumnCount ; i++)
      {
            if(obj_Driver.ColumnName(i) == str_ColName)
            {
                  return i;
            }
      }
      
}

if Column wise approach then you can use below,

function colWise()
{
      var excelDriver = DDT.ExcelDriver("<excel file name>");
      var cno_Col1 = 0;
      
      excelDriver.First();
      var cno_Col1 = getColumnNo(excelDriver,str_ColName);
      
      while(!excelDriver.EOF())
      {
            if(DDT.CurrentDriver.Value(cno_Col1) != "")
            {     
                  skpiNo = cno_Col1;
                  cno_Col1 = getNextColumnNo(excelDriver,str_ColName,skpiNo);
                  Log.Message(DDT.CurrentDriver.Value(cno_Col1));     
            }
            else
            {
                  break;
            }
      }
}
function getColumnNo(obj_Driver,str_ColName)
{
      
      for(var i = 0 ; i < obj_Driver.ColumnCount ; i++)
      {
            if(obj_Driver.ColumnName(i) == str_ColName)
            {
                  return i;
            }
      }
      
}
function getNextColumnNo(obj_Driver,str_ColName,skipper)
{
      
      for(var i = 0 ; i < obj_Driver.ColumnCount ; i++)
      {
            if(obj_Driver.ColumnName(i) == str_ColName && i > skpiNo)
            {
                  return i;
            }
      }
      
}

It already been explained here >> 

Array = [ctrl_id, data, action, keys]

Array[0] == ctrl_id
Array[1] == data
Array[2] == action
Array[3] == keys

So you can use: Log.Message(Array[0])

or more tricky:

[Log.Message(value) for value in Array]

>>> NOTA BENE ! >>>