CheckdigitDammVerify ( digitSequence )

Verifies a digit sequence containing a Damm check digit

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Jeremy Bante
Beezwax Datatools, Inc.
http://beezwax.net

Sample input:

CheckdigitDammVerify ( 12345 & CheckdigitDamm ( 12345 ) )

Sample output:

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*******************************************************************************
 * CheckdigitDammVerify ( digitSequence )
 * Verifies that a digit sequence ending with a Damm check digit has been
 * transcribed correctly.
 *
 * This custom function implements an algorithm described by H. Michael Damm in
 * 2004.
 *
 * @parameter digitSequence: A sequence of decimal digits
 *
 * @return True (1) if digitSequence ends with the correct Damm check digit;
 * False (0) otherwise.
 *
 * @uses CheckdigitDamm ( digitSequence )
 *
 * @history 2014-04-21 - Jeremy Bante <http://scr.im/jbante> - Created
 *
 * @see http://en.wikipedia.org/wiki/Damm_algorithm
 ******************************************************************************/

CheckdigitDamm ( digitSequence ) = 0

Verifies that a digit sequence ending with a Damm check digit has been transcribed correctly.

This custom function implements an algorithm described by H. Michael Damm in
2004.

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CheckdigitDammVerify ( digitSequence )

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