Looping in internal table

Hello Friends,

I am copying some values from one internal table to a structure. Now problem is that, I just filled some fields of the structure not all. E.g I am not filling the field Ist, but 2nd and 3rd. But in the end, it will put some value of my 2nd field into 1st field ( in structure ) and the value of 3rd comes in 2nd and so on ....

It would be nice if some one helps me out, in solving this issue ?

Thanks in advance...