![]() To Control number sum we add 6 * 33 and 7 * 66. Our control sum encrease by 23 * 5.įinaly for A and b we have 1010001100000110. Now we look for code for 7 in B dictionary. For B we use 10111101110 and 100 * 4 to control no sum. This means 11100010110 and 56 * 3 to control no sum.įor 7 we have to switch to A or B. We take 11101101110 and we add 23 * 2 to control no. We take 10110011100 and we add 12 * 1 to control no. We start with 11010011100 and we add to our control no. We may encode it with every dictionary, but let's start it with C, so: Then we take rest of division our result by 103, and use encoded value for it.įinaly we finish the code with 1100011101011.įor example we encode 1234567Ab. ![]() We sum our start number (in brackets), and then for each sign (or pair of sings if C was choosen) When we encode every sign, we should add control number. If there is no code for our sing, we have to switch dictionary. Then look for encoded value for each sing (or pair of signs if we use C) is our dictionary. We start our encoded code according to choosen set: The is always posibility to switch the dictionary. And if our code contains white signs, then use A. If we have some lowercase, let's choose B. For example if we have only digits, the C would be good one. According to the signs in our code we shoud choose dictionary. There are three dictionaries: A, B and C (in the table below). This is a bit simplified descpription, but usable in most cases. įinaly we add 101 to the code and that's it. In this place we are in the middle of the code and we have to paste: 01010.įor the rest of the digits whe use R dictionary. As our first digit is one, we use L for the fifth and G for sixth and seventh: 0110001, 0000101, 0010001. We use L:įor the fifth digit is the first is in (0, 1, 4, 5, 9)įor the sixth digit is the first is in (0, 2, 5, 6, 7)įor the seventh digit is the first is in (0, 3, 6, 8, 9) Here we have to use G because 1 is none of (0, 4, 7, 8) and for four we use 0011101. We use L for the fourth digit if first one is one of (0, 4, 7, 8), else we use G. The fourth digits dictionary also depends on the first one. So here we have on the first digit 1, so let's use L and for three and it would be 0111101. If it is smaller than four, we use L dictionary. ![]() Then we use L dictionary to represent the second digit of the code (the second, not the first). L contains - first is for 0, next for 1 then for 2 and so on. Next step is to convert those digits into string of one and zero. Every time you use Let's barcode to generate EAN13 code, if thirteen digit is different than control number, it is replaced by it. 162%10 = 2 and 10 - 2 = 8 (when rest of division is 0 we use 0), so eight is a control digit and a whole code is 1234567890128. (digit + 3 * digit + digit + 3 * digit + digit + 3 * digit + digit + 3 * digit + digit + 3 * digit + digit + 3 * digit) by 10. Last one is a control number calculated as ten minus the rest of division: ![]()
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