to generate bank card checksum

answered on August 29, 2022 Popularity 1/10 Helpfulness 1/10

answer to generate bank card checksum

to generate bank card checksum

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// To generate bank card checksum that satisfies Luhn algoritm specificaiton:
private int generateChecksum(String num) {
    char[] binAccId = num.toCharArray();
    int sum = 0;
    for (int i = 0; i < binAccId.length; i++) {
        int no = Character.getNumericValue(binAccId[i]);
        if (i % 2 == 0) {
            binAccId[i] = Character.forDigit(no * 2 > 9 ? no * 2 - 9 : no * 2, RADIX);
            sum += Character.getNumericValue(binAccId[i]);
            continue;
        }
        sum += no;
    }

    return 10 - (sum % 10) == 10 ? 0 : 10 - (sum % 10);
 }

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: bank card checksum generate java

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Contributed on Aug 29 2022

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