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 FileMaker Pro Custom Functions

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fnRandom ( minValue ; maxValue )

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  Average rating: 4.6  (24 votes)
  Discuss this Custom Function

Rob Poelking, Excelisys
http://www.excelisys.com

A better random, between a min and max value

Sample Input:
fnRandom ( -20; 30; 1 )
Sample Output:
-2.2


 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed

Description:

I have always found FileMaker's built in Random function completely useless on it's own. Not that the function IS useless, but the random value I always needed was some whole integer. So I was always multiplying it and rounding it. Other times, I needed values that were between a minimum and a maximum. This function solved that particular issue for me.

The problem with the suggested calculation minValue + Round ( Random * ( maxValue - minValue + 1 ); PrecisionDigits ) was that if min and max are 1 and precision is 0, then you could get 2 erroneously.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it

Discuss:

Couldn't it be simpler?

minValue + Int ( Random * ( maxValue - minValue + 1 ) )

comment, VR
January 01, 2014 4:59pm

VR - just discovered an error that when min and max are both 1 and precision is 0, then you could get 2 as a result which would be wrong. I know you're thinking, why would you ever do that but programmatically fetching a random value that could cycle down (as in a loop) you could get the wrong value.

Rob, Cleveland
December 02, 2016 6:29am

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