4.Top-down programming paradigm

1.       What is a top-down approach?

- breaking down a program into subprograms in form of a method or function (top) and specifying its details (down) after.

•       What is a method?

-it is a subroutine that group related statements together and/or protect data from direct access.

2 types of method or function

•       built-in method

•       user-defined method

2.       4 types of user-defined method

•       Method that has no parameter and return no value.

  example:

      void header(){

       //statements

      }

•       Method that has no parameter and return a value.

  example:

      int readIntegerInput(){

                  //statements..

      return <value>

      }

•       Method that has parameter and return no value.

  example:

      void Write(String str){

         //statements either to process or display parameter

      }

•       Method that has parameter and return a value.

  example:

      int ComputeSum(int n1, int n2){

         //statements either to process or display parameter

      return <value>

      }