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Last active April 8, 2018 02:28
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Luhn Checksum project
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gistfile1.txt
Luhn Checksum
http://en.wikipedia.org/wiki/Luhn_algorithm
Implement a Ruby program that outputs the validity of a number by applying the Luhn Checksum.
Input:
The program should accept a single number to validate.
Output:
The program should output the input along with the validity of the number.
Examples:
With an input of 79927398713 the output would be:
79927398713 is valid.
With an input of 79927398710 the output would be:
79927398710 is not valid.
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