Creating functions

Most programs will need to execute code from different NAV objects. This code is contained in functions. This recipe will show you how to create a function and explain in more detail what functions are.

How to do it...

1. To start, let's create a new codeunit from Object Designer.

2. Add a function called CountToN that takes an integer parameter n.

3. Now add the following global variables:

   Name	Type
   i	Integer

4. Write the following code in the function:

   FOR i := 1 TO n DO
     MESSAGE('%1', i);

5. Write the following code in the OnRun trigger of the codeunit:

   CountToN(3);

6. It's time to save and close the codeunit.

7. On execution of the codeunit, you should see a window similar to the following screenshot:

   

How it works...

By creating a function, we can reference multiple lines of code using one easy-to-understand name. Our function is called CountToN, and it takes an integer n as a parameter. This function will display a message box for every number ranging between one and the number that is passed...