Function checkDigitSum

  • checkDigitSum(exchangeWeights: boolean, s: string): number

  • Calculate the check digit sum for a numeric string as per section 7.9.1 of the GS1 General Specifications.

    Parameters

    • exchangeWeights: boolean

      If true, start the weights at 1 instead of 3 on the right.

    • s: string

      Numeric string.

    Returns number

    Accumulated sum of each digit multiplied by the weight at its position.

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