doubt on report

hello friends iam working as an abap consultant as a fresher, so iam having doubts on reports basing on for all entries. material, sales, purchase tables are there for all these i have created internal tables for each and finally i have created one final internal table. for all these i want the exact coding without using subroutines there is a problem in the loop condition for me.

thank you guys

iam expecting answer.

girish saripalli.