What is module, main module and sub module?

  • Module is a small, logical and manageable part of a program. 
    • Module is divided into two parts:
    1. Main module
    2. Sub moodule
  • What is main module and sub module?
    • Main module: The top-level module which is located at the top of all procedures such as SUB-Procedures or FUNCTION is called main-module. It is the entry point of modular programming.
      Procedure names and parameters are declared and called from the main-module.
    • Sub module: Sub-Module is a program, which is written under the main module. A modular program may have one or more than one modules or procedures under main-module. A Sub-Module may have other Sub-Modules.

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