Validate Bank Card Number (Luhn)
Checks the entered data for compliance with the format of the bank card number.
The analysis uses the Luhn algorithm.
Stream connectors
[Input] In - starts block execution.
[Output] Out - is activated when the block has finished executing.
Data connectors
[Input] card_number (string) - the value to check for compliance with the format. [
Output] is_valid (boolean) - if the value matches the format, it returns the value True, otherwise - False.
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