Hi I need help starting this program
The program check to see if a credit card is valid or not
the number is 16 digits long
EX: Card Number 1234567890123456
Code:
1. Double the value of alternating digits of the credit card number
1  2   3   4    5   6   7    8   9    0   1   2    3   4     5   6
   x2       x2       x2       x2        x2      x2       x2       x2
--------------------------------------------------------------------
1  4   3   8    5   12   7  16  9   0   1   4    3    8    5   12

2. Add all the digits
1 + 4 + 3 + 8 + 5 + 12 + 7 + 16 + 9 + 0 + 1 + 4 + 3 + 8 + 5 + 12 =98

3. Divide the sum by 10
98/10=9.8
If the number is evenly divisible then it is valid
If it is not evenly divisible than it is invalud

thanks for the Help Joe