The luhn-10 algorithm is a weighted algorithm. each digit in the credit card number is multiplied by a weight. these weights are then summed, forming the checksum. the checksum is divided by 10. if the remainder is 0, the credit card number is valid. if the remainder is not 0, the user made an error and can be prompted to re-enter their credit card data. the weighting for the luhn-10 algorithm is as follows: beginning with the first (ie leftmost) digit in the credit card, every other number is multiplied by 2. if the product results in a 2 digit number (eg 6 x 2 = 12) then the individual digits (eg 1 and 2) are added to the checksum. the remaining digits of the credit card number are simply added to the checksum. that is, their weight is 1.some examples are given below, but this algorithm will work with your visa or mastercard number. try it! write a method in java named luhnchecksum which takes an array of integers as an input parameter and returns the integer checksum computed by the above algorithm.