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Custom Functions - trying to learn.  Some insight/help is appreciated.

Question asked by c0nsilience on May 18, 2018
Latest reply on May 21, 2018 by richardsrussell

Hi all,


I've never made it a practice to use custom functions due to their breakage with updates, etc., but I do feel like this is an area that quite a few developers neglect, so maybe this thread can help more than just myself to get a solid understanding of this higher-level functionality.


Several of my Senior-level developer friends have put together some use-case scenarios (feel free to add some that you think are worth knowing) and I'd like to get your feedback on (a) if you would use a custom function for this and (b) the logic behind how you would write it.


I'll kick it off:


Create a custom function that is recursive, summing the numbers inclusively between 1 and the number specified.  For example:


  Summation ( 1 ) = 1

  Summation ( 3 ) = 13


The function should return 0 for negative integers.