Modular Programming

QBASIC supports modular programming. The modular programming is a programming technique in which the program is divided into small parts (logical, managable and functional parts).

The small logical, managable and functional parts parts of a program in modular programming are called modules. There are many modules in a modular program, each modular program contains one main module and sub module (procedure) in which thecinstruction codes or statements of a program are written. The statements or codes written in the main module are called Module Level Codes . The statements or codes written in procedure are called Procedure Level Codes. When you run a modular program, the program executes the first statement of main module.