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Programs about verification of imei numbers in c programming

Answer»

The IMEI is validated in following steps:

STARTING from the RIGHTMOST digit, DOUBLE the VALUE of every second digit (e.g., 7 becomes 14).If doubling of a number results in a two digits number i.e greater than 9(e.g., 7 × 2 = 14), then add the digits of the product (e.g., 14: 1 + 4 = 5), to get a single digit number.Now take the sum of all the digits.Check if the sum is divisible by 10 i.e.(total modulo 10 is EQUAL to 0) then the IMEI number is valid; else it is not valid.



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