Is it necessary to use strings for this assignment?

[ZimbuTM]

We have to prompt the user for two integers m and n, then compute and print the sum of the digits of integers m TO n. Example:

1985 1991

1985 - 23
1986 - 24
1987 - 25
1988 - 26
1989 - 27
1990 - 19
1991 - 20

Will it be necessary to convert the integers to string and then use the charAt() method? Is there a simpler way to do this?

Just looking for a hint, no solutions please. Thanks.

[Belisarius]

The charAt() isn't really a good idea, as if the user inputs an extra space by accident, or doesn't use two 4 digit numbers, it'll cause problems. I'd suggest StringTokenizer.

[ZimbuTM]

I'll look into that, although we haven't learned about it yet.

[ZimbuTM]

Is it possible to do this using only integers and no strings?