Compare the last digit of a string with that at the same place of another string

[CodingNoob]

Hi there. I'm new to this forum and to iPhone programming so I'd like your help. I need to compare 2 strings (kind of); "entered" and "stored". The stored string is a fixed long number and I want to check that the last digit of "entered" is the same as the corresponding digit on the stored string (which isn't necessarily the last digit).

For example...

entered = 123456789 stored = 12345678902345678....

Here, Id like to check that "9" on "entered" is the same as the digit in the same position on "stored".

I'm thinking there's 2 ways but if there's a more simple way, your help would be appreciated...

1) check the "entered" string length and compare the character at that position of "entered" and "stored".

2) Check if "entered" string is equal to the value of the corresponding length in "stored".

If you have any insight, code snippet that might help, please let me know.

[smasher]

NSString has a "characterAtIndex:" method you can use to get one character of a string; then you can compare it to the same character of the other string.

NSUInteger lastIndex = [entered length] -1;
unichar lastChar = [entered characterAtIndex:lastIndex];
unichar storedChar = [stored characterAtIndex:lastIndex];

BOOL match = (lastChar==storedChar)
if(match)
     NSLog(@"It's a match!");

I didn't check that "stored" is longer or as long as "entered;" you really should though, to prevent a crash.