0

The tested digits match the specified number of digits, which is specified in operand2 and passed the Modulus 10 algorithm.

1-9

The string, account number, or credit card number is complete but not valid.

#

A # character is returned due to any of the following reasons:

• For string length checks, if the string does not match the specified number of digits.

• For account number, membership number, or credit card number validations, the received number in operand1 does not match the number of digits specified by operand2.

• There is an invalid combination of entries in either operand. For example, you directly or indirectly used either none or # in either operand.

• The result is something other than a digit string in either operand or there are more than two digits in operand2.