Unfortunately, RPG does not support recursivity nor can we call a program that's already in the program stack. But there are cases when this would be greatly appreciated. So I here propose a trick, in the form of a small simple program, that lets us do just that. It consist in creating a duplicate of the program we intend to call "recursivilly" in library QTEMP, under another name. The code for that program UTRCPGM follows. I also provide an example: traditional case for recursivity, the calculation of the factorial of a given number, in the program UTRKFACT. Program TESTRFACT and Display File TESTDFACT provide the user interface.


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This was first published in August 2001

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