hi

actually i am a student of computer science and GW BASIC is included in my course and i have to learn it

As yuo may know by now, we have to number each line. One of the problems with BASIC is that it is easy to produce 'spaghetti' code, with the liberal use of GOTOs. In writing a piece of code, it is better for you to get used to the idea of using separate modules for each task. In various versions of early BASIC they are called sub-routines. There is a need of a 'GOSUB' and 'RETURN'. The use of subroutines is seen as a waste by many students when it comes to writing simple programs like printing "Hello World". What is important is to get into the habit of using sub-routines. It will make life easier as the program grows in complexity. For example it is easier to debug a program with the TRON function, because each important task is enclosed in separate sub-routines. It is also easier to add other tasks or function, simply by creating another subroutine. Just remember to make a call to it from the main module. The basic format that I use is to have a start routine consisting of only a menu. Each choice sends the user to a different subroutine. Maybe you have already been informed about it, but just in case, use line numbering in steps of 10, or greater if you want to. It makes it easier to add other lines in the future.

thanks for commenting