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From FenixWiki

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

• it received 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.

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--Sandman 14:56, 23 March 2007 (CET)