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From FenixWiki

Definition

A function is a subroutine to which one or more of the following apply:

• it receives parameters
  
• it acts on the parameters
  
• it processes data located elsewhere
  
• it returns a value
  

A function does not create a new thread, and therefore the process which called the function waits until the function is completed before continuing executing its code.

As opposed to a process, a function doesn't have a frame; statement. See process for more information.

For a list of functions, see this list of functions.

Example

int addInts( int a , int b )
Begin
    return a+b;
End

addInts(3,6); will return 9. One can see that the function does indeed:

• receive parameters.
• act on the parameters.
• return a value.