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API to select a number at random

We need to select employees at random to do drug testing. Is there a way to select a number at random via an RPG function or something?

There is an API that can do this:

Basic Random Number Generation (CEERAN0) API
This API will generate a number between 0 and 1. (You can multiply the fraction to get the number of random digits you desire.) It is called with 2 parameters and returns a fraction between 0 and 1.

Details can be found here:

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