You're welcome, Zakaria! =)

~~Bonnie


>Thank you Bonnie. That works.
>
>Zakaria al Azhar
>
>>Zakaria,
>>
>>You simply need to cast the objects to the double data type:
>>

>>MyTable.Rows[i]["Qx"] = (double)TableLx.Rows[i][1] + 1/(1.04)*(double)TableLx.Rows[i][1];
>>

>>
>>~~Bonnie
>>
>>
>>
>>>Hello All,
>>>
>>>I have DataTable with some columns. The first column is filled with some double values. The other columns are empty, I want to fill those columns by performing some calculations on the content of the first column,like below:
>>>

>>>MyTable.Rows[i]["Qx"] = TableLx.Rows[i][1] + 1/(1.04)*TableLx.Rows[i][1];
>>>

>>>
>>>This is not possible because the Items are objects and you can't use the '+' operator. How to fill those columns then ?
>>>
>>>Thank you.
>>>
>>>Zakaria