Check if string is palindrome in objective c

Question

I\'m trying to check if a string is palindrome or not using objective c. I\'m new to programming without any experience in other programming languages so bear with me please

Answer 1

@import Foundation;

BOOL isPalindrome(NSString * str)
{
    if (!str || str.length == 0) return NO;
    if (str.length == 1) return YES;
    for(unsigned i = 0; i < str.length / 2; ++i)
        if ([str characterAtIndex:i] != [str characterAtIndex:str.length - i - 1]) return NO;
    return YES;
}

int main() {
    @autoreleasepool {
        NSLog(@"%s", isPalindrome(@"applelppa") ? "YES" : "NO");
    } return 0;
}