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EAN 8 7 numbers are transferred for the EAN 8 code. The 8. digit represents the check number.
The even figures of the information have a factor of "3", the uneven figures a factor of "1".
Counting begins from the left. The resulting cross sum is divided by 10. The remaining fig-
ure is subtracted from the modul (10). If the remainder is "0", the check number is also "0".
Example
Information
40123462
Factor
3131313
Product
12+0+3+2+9+4+18
Cross sum
48
10 (modul) - 8 (remainder) = 2 (check number)
For remainder "0" the check number is also "0".
UPCA 11 numbers are transferred for the UPCA code. The 12. digit represents the check num-
ber. The even figures of the information have a factor of "3", the uneven figures a factor of
"1". Counting begins from the left. The resulting cross sum is divided by 10. The remai-
ning figure is subtracted from the modul (10). If the remainder is "0", the check number is
also "0".
Example
Information
401234567893
Factor
31313131313
Product
12+0+3+2+9+4+15+6+21+8+27
Cross sum
107
10 (modul) - 7 (remainder) = 3 (check number)
For remainder "0" the check number is also "0".
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