Question

Please write code in Python!

Check digit 「ロロロロロロロ 27 31 | 心心心心心心心点,可口 口口口口口口口 (a) Computing the check digit. 3 (b) Checksum validation.

You are asked to implement the following checksum formula to validate an identifi- cation number given to you. The formula works as follows. Using the original number, double the value of every other digit. Then add the values of the individual digits together (if a doubled value now has two digits, add the digits individually). The identification number is valid if the resulting sum is divisible by 10. Write a function called validateID that takes as input an identification number and returns 1 if the number is a valid checksum, 0 otherwise; it also returns the checksum that is calculated. The identification number is supplied to the function as a string.

Answer 1

Code :-

def validateID(idNumber):
   numberList = [int(i) for i in idNumber] #creating list of integers using list comprehension
   checkDigit = numberList.pop()
   total = 0
   flag = 0
   for i in range(len(numberList)):
       if (i%2==0):
           total+=numberList[i]
       else:
           temp = numberList[i]*2
           if (temp>9):
               total+=1 #add the 1 from ten's place
               temp%=10 #obtain one's place digit
           total+=temp
       #print(total) --used for checking
      
   total+=checkDigit #add the checkDigit value
   if (total%10==0): #if divisible by 10 then valid
       flag = 1
   return total,flag

def main():
   identificationNumber = "1762483"
   total,flag = validateID(identificationNumber)
   if (flag):
       print("Valid data : Total is ",total)
   else:
       print("Invalid data : Total is ",total)

#checks if file was run as script or imported
if __name__ == '__main__': main()

Output :-

Valid data : Total is 30