Answer:
def validateID(this_id):
is_valid = 0
checksum = 0
n = int(this_id)
count=1
while(n!=0):
d=int(n%10)
if(count%2==0):
d=d*2
if(d<10):
checksum=checksum+d
else:
while(d!=0):
x = int(d%10)
checksum = checksum + x
d=int(d/10)
else:
checksum=checksum+d
count=count+1
n=int(n/10)
if(checksum%10==0):
is_valid=1
return is_valid, checksum
def main():
test_id = "176248"
is_valid, checksum = validateID(test_id)
if(is_valid==1):
print(test_id+" is valid and checksum is "+str(checksum))
else:
print(test_id+" is not valid and checksum is "+str(checksum))
test_id = "79927398713"
is_valid, checksum = validateID(test_id)
if(is_valid==1):
print(test_id+" is valid and checksum is "+str(checksum))
else:
print(test_id+" is not valid and checksum is "+str(checksum))
test_id = "6080320539447211"
is_valid, checksum = validateID(test_id)
if(is_valid==1):
print(test_id+" is valid and checksum is "+str(checksum))
else:
print(test_id+" is not valid and checksum is "+str(checksum))
return
if __name__ == '__main__':
main()
-3x+6 is equal to -18. because -3 times +6 or positive 6 equals -18 since a negative times a positive equals a negative
