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Luhn algorithm

Question asked by eibcga on Nov 21, 2015
Latest reply on Nov 21, 2015 by eibcga

Hi, I'm trying to create a calculated field or a custom function that computes a check digit using the Luhn algorithm.  If I input digits in a number field, I would like the calculated field to compute the check digit.  Any ideas?  I have seen examples for Excel using array formulas or other formulas, but cannot seem to get it to work using FMP.  I'm already using a custom function in FMP for the Verhoeff algorithm, but not sure if there is already a similar function for Luhn.

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