Need help on python

value = 608

x = abs(int(str(value)[1])-int(str(value)[0])) y = abs(int(str(value)[1])-int(str(value)[2]))

weight = x+y c = str(weight)

print("That is "+ c)?

My code got the right answer but

Do I have to use main(), for char in value, and for loop?

if i have to could you please show me how use those for this question ?

# The main() function starts the program # Display a description of the program's purpose # Prompt the user for a 3-digit CVN # Call the weight() function providing the 3-digit t CVN as an argument # The weight() function requires an integer parameter # Convert the Integer to a string # Initialize any necessary variables # setup a for loop that uses the digits as a sequence # sum the differences between each digit # Print the calculated weight of the Integer # Call the main() function