Concordance Programming Fundamentals > Writing a Function

In CPL, a function is a re-usable procedure within an application. Functions exist because, very often, you may need to perform certain tasks multiple times. Or, they exist because they can act as reasonable abstractions for certain tasks.

The following script declares and uses the Multiply_X_by_Y CPL function, which will be analyzed in the following topics:

main()

{

int myValue;

int valOne;

int valTwo;

valOne = 10;

valTwo = 5;

myValue = Multiply_X_by_Y(valOne, valTwo);

}

Multiply_X_by_Y(int x, int y)

{

int z;

z = x * y;

return(z);
}

Topic	Description
About the Main() Function	Discussion of how the main() function starts off the entire CPL script.
Beginning and Ending a Function	How to begin and end a function.
Declaring Variables	How to declare and use variables in a function.
Writing a Function Body	How to write a function.
Returning a Value	How to return a value from a function call.
Calling a Function	How to call a function from another function, such as main().
About Built-in functions	Discusses the built-in CPL functions.

About CPL Functions

About CPL Functions

Topic

Description